DENNETT’S UNCONSCIOUS AUTO-BIOGRAPHY

INTRODUCTION

Gradually it has become clear to me what every great philosophy so far has been: namely, the personal confession of its author and a kind of involuntary and unconscious memoir. (Nietzsche: Beyond Good and Evil Sec 6)

In this paper we will argue that Dennett’s views on the nature of the mind are based on him unconsciously projecting his own idiosyncratic type of mind onto all other people. We will argue that he is guilty of what William James called “The Typical Mind Fallacy” of assuming that his type of mind is representative of all types of mind. We will show that Dennett has a particular type of consciousness and that his type of consciousness is not representative of the consciousness of all other people. We will demonstrate that Dennett has a “Bodily-Linguistic Type of Consciousness”. However, prior to doing this we will sketch the typology which we are using to interpret the mind of Dennett and what evidence we have to support the existence of this particular typology.

We are working with the typology which David Berman invented in his 2008 book Penult. This typology divides people into three main divisions: (1) Type 1: Mentalistic Consciousness, (2) Type 2: Bodily Consciousness, (3) Type 3: Socio-Linguistic Consciousness. The evidence for this typology comes from the variability people have in their mental abilities. Some clear examples of mental variability which have been confirmed are:

(1)Galton: Provides evidence that people have different abilities to form mental imagery. See also Kosslyn, James etc.

(2) Dalton’s discovery that some people are colour blind.

(3) Some people have synesthesia; this fact was denied for years but is accepted now.

(4) There are variations in how people experience pain. See, for example, Roger Filligim (2005) “Sex and Gender Issues in Pain”, as well as Young et al. (2008) “Genetic Differences in Pain Variability”.

The above four examples show variation in people’s cognitive abilities and subjective experiences which went undetected for years before being discovered by empirical research. We suggest that such variation in mental abilities inadvertently influences the theories of the mind which philosophers construct. So, for example, there is evidence that people’s psychological abilities affect the philosophical theories they accept; see Berman “Philosophical Counseling for Philosophers” (2013), as well as William James “Principles of Psychology” (1892), and Holtzman “Do Personality Effects Mean That Philosophy is Intrinsically Subjective”? (2013).

Showing that there is variation in people’s mental abilities and that these variations influence the type of theories which philosophers accept is one thing, however it is not evidence for Berman’s Tripartite Typology. In his Penult Berman uses evidence from the history of philosophy, evidence from interviews with living subjects, as well as his own introspective experiences to justify his Typology. His Typology makes sense of the views of the great philosophers throughout history. It also shows why so many of the great philosophers, in the past despite being great thinkers, could not agree with each other about the nature of the mind. All of these philosophers were operating on the mistaken assumption that there is only one type of mind. The diagram below shows how Berman divides the philosophers of the past according to his Tripartite Typology.

Type 1 Kant Nagel Searle Type 2 Type 3 Descartes Berkeley Plato James Dennett (major2/minor3) Spinoza Russell Rorty (major3/minor2) Hegel

Berman’s Typology

Type 1 philosophers have a strong experience of their own consciousness; this experience is called unbounded consciousness. Type 2 philosophers have no experience of unbounded consciousness; their experience is entirely bodily and linguistic. Type 3 is a socio-linguistic type of consciousness. The various different types of consciousness can be blended, with one of the types being dominant. So, for example, Berman argues that both Rorty and Dennett are a blend of Types 2 and 3; with Dennett Type 2 is dominant, while for Rorty Type 3 is dominant (Penult p. ).

Berman’s three main psychological types are vividly represented by Rene Descartes (Type 1), William James (Type 2), and Richard Rorty (Type 3). The following quote from Descartes illustrates his Mentalistic abilities:

When I consider the mind—i.e. consider myself purely as a thinking thing—I can’t detect any parts within myself; I understand myself to be something single and complete. The whole mind seems to be united to the whole body, ·but not by a uniting of parts to parts, because if a foot or arm or any other part of the body is cut off, nothing is thereby taken away from the mind. As for the faculties of willing, understanding, of sensory perception and so on, these are not parts of the mind, since it is one and the same mind that wills, understands and perceives, They are (I repeat) not parts of the mind, because they are properties or powers of it. (Descartes: Meditations on First Philosophy p. 11)

The above quote illustrates that, as a Type 1 philosopher, Descartes experiences himself as primarily a mental entity. James’ experience of himself is entirely different:[1]

Let the case be what it may be for others, I am as confident as I am of anything that, in myself, the stream of thinking (which I emphatically recognize as a phenomenon) is only a careless name for what, when scrutinized reveals itself to consist of the stream of my breathing. (James 1904)

There is I mean no aboriginal stuff or quality of being, contrasted with that of which material objects are made, out of which our thoughts of them are made, but there is a function in experience which thoughts perform…(namely)…knowing. Consciousness is supposed necessary to explain the fact that things not only are, but get reported, are known. (James: 1904 p.101)

Everyone assumes that we have direct introspective acquaintance with our thinking activity as such, with our consciousness as something inward contrasted with the outer objects which it knows. Yet I must confess that for my part I cannot feel sure of that conclusion. Whenever I try to become sensible of my thinking activity as such, what I catch is some bodily fact an impression coming from my brow, or head, or throat or nose. It seems as if consciousness as an inner activity were rather a postulate than a sensibly given fact. (James: 1892: Text Book of Psychology p. 467)

James above is denying that we introspectively experience consciousness; his distinctive subjective experience is entirely different from Descartes’. While Descartes and James are good exemplars of Type 1 and Type 2, Richard Rorty is a good exemplar of Type 3. Here some Rorty quotes illustrate his type of mind:

The temptation to look for criteria is a species of the more general temptation to think of the world, or the human self, as possessing an intrinsic nature, an essence. That is, it is the result of the temptation to privilege someone among the many actual and possible languages in which we habitually describe the world or ourselves (Richard Rorty: Contingency, Irony and Solidarity p. 15)

This is that there is nothing deep inside each of us, no common human nature, no built in solidarity, to use as a moral reference point… To be a person is to speak a particular language, one which enables us to discuss particular beliefs and desires with particular sorts of people. It is a historical contingency whether we are socialized by Neanderthals, Ancient Chinese, Eton, Summerhill, or the Ministry of Truth. (ibid p 177)

We can see from the above quotes that Rorty is incapable of conceiving of himself independent of language. This is a clear indication that he is a Type 3 thinker.

In his Penult Berman goes into much more detail in defending his typology. Here we have shown what the evidence for the typology is and how it explains the philosophical views of various great philosophers. Throughout this paper we will analyse Dennett’s writings in detail to show that he is a combination of a Type 2, and a Type 3 thinker and that he incorrectly generalises his type of mind to be representative of all minds. We will analyse Dennett’s views on Mental Imagery, Dreams and Pains and show that his views on these topics are derived from his own subjective experience of these phenomena.

DENNETT: EARLY CHILDHOOD AND PHILOSOPHICAL DEVELOPMENT

We will make the case that Dennett’s philosophy of mind is partly derived from his own idiosyncratic psychology. This claim portrays Dennett as having experiences which are radically different from the experiences of other philosophers. This leaves the question of how Dennett has developed the type of mind that he in fact has. Was his type of mind derived from his genetic code, or did socialisation play a more important role? Any answer to this question will be highly speculative as there is little written about Dennett’s upbringing and obviously we have no information about the structure of his genetic code. However, trying to understand Dennett’s life and to what extent his experiences influenced the type of mind he developed will help to make sense of his strange views on the nature of the mind. Dennett wrote a small auto-biography detailing his life experiences. Discussing this auto-biography will help us understand his type of mind better.

Dennett’s brief discussion of his early life and his early education in philosophy is interesting but fairly sparse in details. Certain things do stand out though. Dennett’s early loss of his father was obviously a traumatic experience for him. According to Dennett, he was expected to follow his father into academic life in the humanities. So while Dennett’s father was no longer alive he was present to Dennett as an idealised figure. His father was an idealised figure who people expected Dennett to live up to and to follow into the humanities. Dennett was interested in engineering and loved building things yet was expected to go into the humanities. This situation would create resentment in most teenagers. His own dreams and aptitudes were subordinated to the expectations and wishes of his parents. He managed a minor rebellion against his family’s wishes by not going to Harvard. He instead went to Wesleyan University. He studied Maths and English. It was in his advanced Maths Class that he first discovered Quine’s work when he read his book ‘Mathematical Philosophy’. When Dennett first read Quine’s “From A Logical Point of View” he claimed he was impressed but found something wrong with Quine’s position. So Dennett contacted Quine and transferred to Harvard. It is worth noting that after less than a year Dennett’s rebellion against his parents’ wishes had ended. He was studying where they wanted him studying. Furthermore, he was studying philosophy a humanities subject. So Dennett’s discovery of Quine was doubly beneficial for him; he had found a thinker who really interested him and he had found a way of pleasing his family (in particular his dead idealised father). Another benefit which the discovery of Quine had for him was that it helped Dennett keep both his family and himself happy simultaneously. By studying Quine he would be studying a humanities type subject (keeping his family happy), while Quine’s interest in natural science and formal logic chimed well with Dennett’s scientific/engineering interests. So it is understandable that Dennett was excited by the discovery of Quine, as it helped him to fullfill his own desires and his deep need to live up to his father’s expectations.

Dennett eventually wrote his undergraduate thesis on Quine. He called the thesis “Quine and Ordinary Language”. There are no details of the thesis available though Dennett mentions that it was critical of Quine and that Quine thought highly of it. Dennett said that at this stage of his development, he, unlike most of his fellow students, held Ryle’s work in high regard. He thought of Ryle’s “The Concept of Mind” one of the best philosophy works he had read. Dennett finished college at the age of twenty and at this early stage of his development his primary influences were Ryle and Quine, both of whom were behaviourists. So it is tempting to argue that Dennett’s strange eliminativist views on the mind resulted from his being educated by behaviourists: but this cannot be correct both Nagel and Kripke were undergraduates with Dennett, and they certainly did not end up sharing Dennett’s view of consciousness. So we need something more than the influence of Dennett’s teachers to explain his views on consciousness. Something in Ryle and Quine chimed with Dennett. We argue that their theories seemed intuitively correct to him because they rang true to him at an experiential level. Their theories of the mind rang true to his own lived experiences. Those with different types of mind, for example Nagel and Kripke, found Ryle’s theory counter-intuitive because the way they experienced the world was so different than Ryle or Quine’s descriptions of the mind.

Because he thought so highly of Ryle Dennett went to Oxford to study under him. Ryle was the supervisor of Dennett’s doctoral thesis which eventually became his book “Content and Consciousness”. Dennett notes that he saw problems with qualia as early as 1963 and even then he believed that our conscious experience only seemed to be as rich as we believed it was. So we can see that from a very young age he already felt that the philosophical community was deeply wrong about the nature of the mind. He would spend the next fifty years developing arguments and finding empirical evidence which supported his intuitions on the nature of the mind. Pretty much from day one in Oxford he tried to inform his theories of the mind with the best neuroscientific evidence available. His PhD was so deeply immersed in neuroscience that a neuroscientist was asked to examine his thesis. Dennett had managed to follow in his father’s footsteps while still getting to study the science which so interested him.

The most important thing to note about his description of his early childhood development is the fact that from the age of seventeen when he was first exposed to philosophy he was well-disposed to the philosophies of Quine, and Ryle. This indicates that he saw something in their behaviouristic explanations of mind which chimed with his own experience. He felt that ‘qualia’ was a useless theoretical term as early as the age of twenty-three. His entire philosophical life was dedicated to providing philosophical arguments and scientific evidence to support his intuitions of the mind.

What appealed to Dennett about Ryle and Quine was their emphasis on language and behaviour. Subjective experience was not important to either Ryle and Quine and they believed that language played a central part in making us human. Dennett being primarily a linguistic-bodily thinker would have related to Ryle and Quine perfectly.

DENNETT ON CONSCIOUSNESS AND LANGUAGE

Dennett’s theories of mind and consciousness have always emphasised the importance of language for thought and experience. In “Consciousness Explained” Dennett described the self as follows:

Selves are not independently existing soul-pearls, but artifacts of the social processes that create us, and, like other such artifacts, subject to sudden shifts in status. The only “momentum” that accrues to the trajectory of a self, or a club, is the stability imparted to it by the web of belief that constitute, it, and when those beliefs lapse, it lapses, either permanently or temporarily. (Consciousness Explained: p 423)

We suggest that Dennett’s description is of his own type of mind and not of the minds of all people. Language is such a deep part of his self that he is incapable of thinking independently of it. We will provide evidence for this claim by examining his views on Mental Imagery, Dreams, and Colour etc.

The importance of language for Dennett becomes even more apparent when one considers his theory of consciousness. Dennett’s theory of consciousness which in 1996 he dubbed the “Fame in the Brain Model” is meant to replace the tempting idea of the “ Cartesian Theatre”. Throughout his philosophical career Dennett has attempted to replace the “Cartesian Theatre” picture with increasingly more apt models, from his “Multiple Drafts Model” to his “Fame in the Brain” model to his “Fantasy Echo Model”. With his Fame in the Brain model he argues that consciousness is more like fame than television. It is not a special “medium of representation” in the brain into which content-bearing events must be “transduced” in order to be conscious (Sweet Dreams: p. 160). He argues that it is more like fame, where one content bearing event achieves something like fame in competition with other fame-seeking events. This metaphor is obviously imperfect. Fame is typically an intentional object of a number of agents (ibid, p.161), and he concedes that it makes little sense to think of multiple homunculi all holding some content as an intentional object and elevating it to fame. So he instead opts for the less troublesome metaphor of consciousness as “influence in the brain”.

For Dennett conscious events are attention-grabbing events. They are thoughts that persist in the mind for a sustained period of time. To help us think about this fact he asks us to think about them in terms of fame and how long a period a person can be famous for. Dennett plausibly argues that a person cannot be famous for a few seconds; likewise, a person being viewed by millions of people on television will not necessarily be famous. No matter how many people may see me in the background in some sitcom this will not make me famous. To be famous I would have to be a person whom others talked about enough to ensure that my presence reverberated within the stream of public discourse. To achieve this importance within the public stream of discourse takes time; it does not happen instantly. Some may argue that it in fact does occur instantly. They will point to people who seem to achieve instant fame as a result of some event, for example, an assassin of a president may achieve a level of instant fame. Nonetheless, despite appearances, instant fame does not really occur. It is something which is conferred post-hoc as a result of the influence the event has on the public discourse of others. Without the reverberations within the linguistic community the shooter would not achieve fame. Dennett argues that consciousness has similar features to the type of fame that is achieved in the external world.

For Dennett, fame in the brain, like fame in the world, requires echo-making capacities. To say that something is conscious even though it doesn’t have any echo-making properties within the mind is for Dennett senseless. Dennett uses the example of the aroma of classroom library paste as something that has echo-making properties for him. The aroma has strong echoic properties because it evokes various vivid childhood memories and associations for Dennett.

To be conscious is precisely to have a thought that yields enough influence to direct a lot of homunculi to engage with it, he argues that fame is like this too. He also notes that the nature of fame has changed with the invention of electronic media:

“ a recursive positive feedback became established, dwarfing the initial triggering event and forcing the world to wallow in wallowing in wallowing in reactions to reactions to reactions to the coverage in the media, and so forth.” (ibid p. 167)

He thinks that such fame was very difficult to achieve in the pre-electronic age. He argues that language did for human consciousness what electronic media did for fame: it transformed it. It is for this reason that he calls us ‘Joycean machines’. The recursive capacity which is a central feature of natural language is one of the key features of consciousness. Dennett even makes the speculative prediction that non-human animals may have little echoic capacities so strictly speaking will not have consciousness. Dennett’s view on animal consciousness is definitely a minority position. The majority of scientists now accept that animals are conscious. Obviously, science is not a majority rules activity so the fact that Dennett’s position is not accepted by many does not prove that it is incorrect. The primary reason that people argue that non-linguistic animals are conscious is because of their complex behavioural capacities. Behavioural tests have shown that some animals have complex concepts of number, agency, causality etc. However, Dennett points to the fact that people often reason with these concepts unconsciously and asks whether we can be sure that animal’s competence with the above concepts may entirely involve unconscious reasoning. He also notes that we cannot be sure that animal’s behaviour isn’t a kind of blind-sight. Such animals would be able to predict certain aspects of their environment without having any conscious experience of doing so. It is worth noting though that some mammals also respond to anti-depressants and anti-anxiety medications in a similar way that humans do. This indicates that their experiences are similar to ours. There is little to recommend the view that such animals are suffering from total blind-sight in all of these areas, though it is admittedly theoretically possible.

Dennett’s speculation that non-linguistic animals may not be conscious is not central to his theory of consciousness. If his claim about the consciousness of non-linguistic animals not being conscious were refuted (and I think it will be), this would not refute his theory of consciousness as influence in the brain. Non-linguistic animals may have basic recursive capacities that make the type of conscious experience which Dennett talks about possible.

At this point I should clarify what Dennett means by recursive capacities. In an obvious sense Dennett cannot mean that recursion is entirely unique to humans. Dennett accepts the computational theory of the brain; he also accepts that the computational procedures govern animal brains. It is a fair bet that the computational procedures which govern human and animal brains sometimes involve recursion. Dennett does not deny this obvious fact about the structure of animal brains. When he says that human language has a unique recursive structure he is speaking of recursive structure as a kind of software. He calls this software a virtual Von-Neumann machine (Consciousness Explained, p.201 ). Dennett argues that the mind is like a software programme installed on the parallel neural networks of the brain ( Densmore and Dennett 1996 p .1). The software is installed onto the hardware of the brain through memes. Our linguistic abilities give us the capacity to understand and produce a potentially infinite amount of sentences. Through communicating with each other humans can learn different ways of thinking about the world. Our culture, made possible by our linguistic capacities, means that every child born into a linguistic community will have the capacity to use the tools for thinking which were created by previous generations, such as mathematics, logic, the scientific method etc. These tools, when learned, install programmes which can give brains the capacity to think in ways which are far superior to the ways animals unaffected by culture are capable of thinking. This is analogous to the way in which some software (e.g an app), when installed on a hardware, gives the hardware capacities which it previously did not have.

We can see from the above description that Dennett’s conception of consciousness is strongly tied up with linguistic competence. This equating of consciousness with language is so strong that he goes as far as to deny that animals are conscious. Dennett’s equating of consciousness with language is at odds with a lot of neurological data. Yet he stubbornly persists in claiming that language and consciousness are intimately connected. A possible explanation for his position is that he is unconsciously projecting his own mental abilities onto those of others. To analyse this contention we will examine his overall views on consciousness. In Part 1 we will examine his views on mental imagery, and dreams. In Part 2 we will examine his views on the nature of pain. We will show by analysing Dennett’s conception of mental imagery, dreams, and pain that he is guilty of unconsciously commiting the typical mind fallacy.

PART 1: DENNETT ON MENTAL IMAGERY

We claim that Dennett is a non-imager whose views on the nature of mental imaging are derived primarily from his own idiosyncratic psychological abilities. We argue for this conclusion by considering various psychological tests which indicate that people do indeed have differing abilities to form mental imagery, ranging from non-imagers to eidetic imagers. We will analyse Dennett’s various different discussions of mental imagery and show through textual analysis where he indicates that he may be a non-imager. We will compare Dennett’s reports of his imaging abilities with those of other people with various different levels of imaging abilities. Overall we will conclude that it is highly probable that Dennett is a non-imager.

Section 1: Dennett: Experience is not what you think it is

Dennett discusses pain in the context of a general evaluation of our supposed phenomenological world in Chapter 2 of Consciousness Explained. Dennett proposes a number of experiments, which are designed to show us that our knowledge of our phenomenological world is less accurate than we assume. He proposes an experiment on mental images p. 27, one on our sense of touch p. 47, one on sound p. 49, and one on vision p. 54, as well as the experiment on pain p. 60. Dennett argues as follows from his experiments:

Did anything you encountered in the tour of the phenom in the previous chapter surprise you? Were you surprised for instance that you could not identify the playing card until it was almost dead centre in front of you? Most people, I find, are surprised-even those who know about the limited acuity of peripheral vision. If it surprised you, then that must mean that had you held forth on the topic before the surprising demonstration, you would very likely have got it wrong. People often claim a direct acquaintance with more content in their peripheral visual field than they in fact have. Why do people make such claims? Not because they directly and incorrigibly observed themselves to enjoy such peripheral content, but because it seems to stand to reason…Am I saying that we have absolutely no privileged access to our conscious experience? No, but I am saying that we tend to think we are much more immune to error than we are. (Consciousness Explained p.68).

The card experiment is easily testable because the card exists in the external world. So when we ask people what card they are seeing we can test their claims against a fact in the external world. Asking people about things like mental images is different; when people make claims such as ‘I am a vivid imager’ we cannot easily test whether such people are guilty of exaggerating their experiences like we can with the card test. Likewise with people’s experience of pain. Dennett is asking us how we can know that people are not spinning stories based on theories they hold as opposed to observing internal objects? However, let us assume that his comparison of the card trick with our internal experiences of mental images, and felt experiences of pains, is valid. What would this mean for our theory? Suppose that in the card experiment some of us discovered that our visual experiences were not as accurate as we believe they are, we did not discover that we have no experiences, our experience of the card at the centre of our visual field was ok. It was only our peripheral vision which was affected. If our introspective experiences are analogous to our perceptions and the same errors occur then this means that we have to be careful with our introspection, not that introspection is somehow inherently flawed.

Section 2: Mental Imagery

William James and Francis Galton famously warned us against making the typical mind fallacy, of wrongly assuming that all people have minds which are the same as ours. Galton’s breakfast table questionnaire showed that people have differing abilities to form mental images, ranging from non-imagers to weak imagers to strong imagers to eidetic imagers. Recently psychologists Reisberg, Pearson and Kosslyn’s paper “Intuitions and Introspections about Imagery: The Role of Imagery Experience in Shaping an Investigator’s Theoretical Views” demonstrated that people who were working on the imagery debate were influenced by their own imaging abilities as to what views they held on the nature of imagery. Their study showed that, as scientists did more experiments and learned more about the topic, their imaging abilities played less of a role in what their views on the topic were because they were more influenced by the scientific evidence. Kosslyn however noted that a small percentage of those studied were not swayed by the scientific evidence:

In addition, the VVIQ scores were correlated with the responses for the views in 1980: the results indicated that researchers who reported less vivid imagery were more inclined toward the propositional view. Thus, in the early stages of the debate, researchers’ personal experiences were related to their theoretical stances. In contrast, when the VVIQ scores were correlated with their current views, the scores were found not to be correlated with their current attitude. This finding suggests that scientists really do pay attention to the data and let the data take precedence over their introspections or images. As results from increasing numbers of imagery experiments were reported and the case for depictive representations grew stronger, even many of those with poor depictive imagery became convinced that depictive representations exist and are used in imagery. Nevertheless, some of the extreme cases-who reported no imagery-persisted in denying the existence of mental imagery. (Kosslyn et al: The Case for Mental Imagery p 181)

Kosslyn claims that in some extreme cases people who have no imagery persist in denying the existence of mental imagery. In an online article for edge.org Kosslyn argued that Zenon Pylyshyn was a non-imager whose views on the imagery debate were strongly derived from his lack of ability to form mental images. We aim to demonstrate in this paper that Dennett’s views on mental imagery can also be explained by his being a non-imager.

Dennett typically interprets people’s claims that they think using mental images as being nothing more than a theorists fiction; in other words, a metaphor[2]. The reason he gives for this belief is partly based on his heterophenomenological method and his theoretical belief that, since people have no internal eyes, then having mental images is impossible. We do not doubt that some of Dennett’s reasons for treating mental images as metaphors are theoretical, however we argue that the primary reason Dennett treats mental images this way is because he is a non-imager. This is not meant as any kind of personal slight on Dennett; both of the authors of this paper are extremely poor imagers. In fact one of the authors of this paper, David Berman, has written a paper “Philosophical Counselling for Philosophers” (2008), which recounts how his own philosophical views were inadvertently affected by the fact he is a poor imager. It is vitally important that such facts are discovered if we are to ascertain the truth rather than merely assume that all thinkers’ minds are the same.

In his “Heterophenomenology Revisited” (2007) Dennett makes clear his views on mental images and his view that they are mere metaphors which describe neurological facts we do not yet understand. I will quote his views in this paper in full as they are very instructive:

The standard presumption is that ‘’I know because I see it’’ is an acceptably complete reply when we challenge a reporter, but where a subject is reporting on mental imagery, for instance, we create an artefact. We ask a subject to tell us how many windows there were in the front of the house he grew up in, and he closes his eyes for a moment and replies ‘‘four’’. We ask: How do you know? ‘‘Because I just ‘looked’… and I ‘saw’ them!’’ But he didn’t literally look. His eyes were closed (or were staring unfocused into the middle distance)…When we confront this familiar vacuum, there is an almost irresistible temptation to postulate a surrogate world-a mental image-to stand in for the part of the real world that a reporter observes…The ‘’recollected image’’ of the house has a certain richness and accuracy that can be checked, and its limits gauged. These limits give us important clues about how the information is actually embodied in the brain, however much it seems to be embodied in an ‘’image’’ that may be consulted. This is where the experimental work by Shepard, Kosslyn, and Pylyshyn and many others comes into play. (Hetrophenomenology Revisited. Pp. 256-257).

One important point to note is that Dennett cites the experimental work of both Kosslyn and Pylyshyn as a way of finding out what is actually going on in the brain. This is interesting because of course Kosslyn is a defender of mental images, while Pylyshyn uses his experiments to cast doubt on the existence of mental images. This may give the impression that Dennett is open to the existence of mental images, that he is merely doubting them for the purposes of collecting heterophenomenological data, which he will later subject to experimental tests. However, his discussion of Shakey the robot shows that Dennett actually subscribes to the more radical view that mental images do not exist.

Shakey is a robot that Dennett introduced into Consciousness Explained for a thought experiment. Shakey is an actual robot that was built in 1966 and that is programmed to move boxes in the room. Below (fig. 1) is a picture of Shakey as he appeared in 1966 when he was first built:

Fig 1 Shakey

Shakey cannot speak, however Dennett speculates that if we could programme it with a language we could programme it to report that it moved boxes by rotating mental images of the box in its mind’s eye. We as designers know that Shakey does not actually rotate mental images in his mind before moving the boxes. Dennett suggests that something similar occurs when humans report rotating mental images:

If a human subject says she is rotating a figure in her mind’s eye, this is a claim about what it is like to be her, and indeed she intends to describe, unmetaphorically and accurately, a part of the real world (a part that is somehow inside her) as it seems to her. But she is speaking at best metaphorically and at worst creating an unwitting fiction, for we can be quite sure that the process going on in her head that inspires and guides her report ( to put it as neutrally as possible) is not a process of image rotation. (ibid, p. 258).

Here we can see clearly that Dennett, despite his claims of neutrality, is denying that people really have mental images. The above statement casts interesting light on a recent comment on his imaging abilities that Dennett made:

And when I do these mental gymnastics I make heavy use of my imagination, exploring various diagrams and pictures in my head, for instance. In short I exploit what Descartes would disparage as merely my imagination to accomplish what he would celebrate as my conception. (Intuition Pumps And Other Tools For Thinking: p. 289)

Here Dennett is claiming that he makes heavy use of mental images to think. However, when placed alongside his views on Shakey it is obvious that he cannot be claiming that he experience mental images. Suppose I see what I think is a ghost on front of me. If it is afterwards shown that what I thought was a ghost is merely a projected image created as a hoax this will affect my beliefs about the nature of what I saw. However, it will not change the fact that I did indeed experience something. The case of Shakey is different, according to Dennett. We and Shakey may sincerely report rotating a mental image in our mind’s eye, however we do not actually rotate the mental object or experience ourselves doing so; we merely report doing so. It is inconceivable that Dennett could subscribe to the view that all we are doing is giving a verbal report of something that we do not experience, if he in fact experienced mental imagery. We suggest that based on Dennett’s views on the nature of imagery, his casual remark about thinking in imagery must be merely metaphorical.

Dennett spends a lot of Hetrophenomenology Revisited arguing that he is neutral about the reality of the descriptions people give of their internal world. However, his manner of characterising people’s reports in terms of a fiction contradicts this supposed neutrality. His discussion of after-images nicely illustrates this point:

Just as the fictional Sherlock Holmes can be correctly described as taller than the real Max Beerbohm, the fictional red stripes on your afterimage can be correctly described by you as somewhat more orange than the real red stripes on the flag flying outside the window. Fiction is parasitic on fact, and the afterimage stripe is red in exactly the same way that Holmes is tall. (ibid, p.263).

So here we see that Dennett, despite his claims of neutrality is in fact denying the reality of afterimages. We suggest that there are two sources for his scepticism: (1) a theoretical commitment to materialism, and (2) the fact that he is himself non-imager. We will primarily focus on fact number (2).

When criticizing traditional phenomenology Dennett complains that we are unable to agree what is and is not phenomenologically manifest (ibid, p. 261). We suggest that the reason that phenomenologists have not discovered one true description is because different theorists have differently structured minds. However, for the purposes of this paper we will primarily evaluate Dennett’s kind of mind, and compare it with the minds of other kinds of thinkers. We will examine some of the claims Dennett makes in his book Consciousness Explained to illustrate this point.

In Consciousness Explained Dennett asks his readers to perform the following experiment:

When you close your eyes, imagine, in as much detail as possible, a purple cow.

Done? Now:

(1) Was your cow facing left or right or head on?

(2) Was she chewing the cud?

(3) Was her udder visible to you?

(4) Was she a relatively pale purple, or deep purple?

(Conscious Explained p. 27)

Dennett speculates that most people would be able to answer this question, and that if they were not able to answer it they probably did not try to call up the image but merely said the words ‘call up a purple cow’ to themselves. This fact seems to indicate that Dennett is himself capable of calling mental images to mind. This is interesting because in his discussion of Shakey the robot he argued that people only have mental images metaphorically, yet in the above discussion of purple cow he seems to admit that he can form mental images. However, a closer look at Dennett’s views shows that he is not in fact claiming to be able to form mental images. Dennett claims that there are many things which we believe we experience but which, upon closer reflection, we do not experience. So, for example, in Consciousness Explained pp. 53-55 he discusses our visual field. He notes that from the point of view of naive reflection our visual field seems to be uniformly detailed from the centre out to the boundaries. However he asks the subjects to perform an experiment of trying to distinguish cards at the periphery of one’s visual field. People always fail this test. Dennett takes this fact to establish that while it may seem to people that they have certain experiences, experimental studies can reveal otherwise. He views the case of imagery as similar to the case of the visual field. It often seems to people that they have experiences of mental images; however a closer inspection reveals this to be wrong. In his Content and Consciousness Dennett speaks of a mental image of a Tiger. He notes the following:

Consider the Tiger and his Stripes. I can dream, imagine or see a striped tiger, but must the tiger I experience have a particular number of stripes? If seeing or imagining is having a mental image, then the image of a tiger must- obeying the rules of imaging in general-reveal a definite number of stripes showing, and one must be able to pin this down with such questions as ‘more than ten?’, ‘less than twenty?’. If, however, seeing or imagining has a descriptional character, the question needs no definite answer. Unlike a snap shot of a tiger, a description of a tiger need not go into the number of stripes at all; ‘numerous stripes’ may be all the description says. (Dennett: Content and Consciousness p.154).

Dennett’s argument is that people cannot count the stripes of supposed mental images of tigers. Therefore purported mental images just seem to be images and upon closer inspection they are revealed as mere descriptions of a tiger[3]. Dennett is doing a similar thing when asking people to call up a mental image of a cow. He admits that it seems like we can do so, however he asks us further questions which aim to cast doubt on the reliability of our introspections.

Dennett follows up his question about an imagined purple cow by asking us to imagine a yellow cow. He asks us to answer the same four questions about the mental image of the yellow cow. He then asks a fifth question: (5) What is the difference between imagining a yellow cow and a purple cow? Dennett argues that since nothing in the brain is purple or yellow, and even if it were we have no internal eyes to see such creatures, then such claims must be mere seemings rather than something we actually experience. Some philosophers have argued that since we can experience a yellow or a purple cow in our mind’s eye and these experiences by Leibniz’s law cannot be identical with brain states which are neither yellow or purple, and they are not events in the external world, then they must be in a different realm, the realm of the non-material mind. Dennett’s discussion of Shakey above is his way of doing away with this problem. The thought experiment of Shakey is designed to show a creature who can report on mental states which it does not experience. Dennett argues that as a matter of empirical fact we are such creatures. We will argue on the contrary that Dennett is, as Nietzsche says, giving an unconscious autobiography of his own mental type. We will develop this point further when discussing Dennett’s take on Kosslyn’s experiment on mental rotation later in this paper.

Later in Consciousness Explained Dennett makes further claims about introspection which give us a deeper insight into the type of mind he has. He notes the strange fact that since Descartes’ time, philosophers have been trying to describe the basic facts of their internal experiences in as clear a manner as possible, and yet have no clear results which all agree on. He considers briefly the possibility which we are developing here that people have different types of mind and that they are accurately describing their own types of experiences. But he never really considers any evidence for or against this possibility. Instead he explains the lack of agreed upon introspective results in terms of the fact that our internal world is so vague that over-theorising our vague internal experiences will result in us unwittingly creating fictional internal worlds. It is important to note that Dennett does not offer much evidence to support his view that introspection is theorising on vague, practically non-existent internal world. He points out that some experiments prove that people are wrong about aspects of their perceptual experiences which they have made confident assertions on. However, the fact that people can be wrong about their perceptual experiences does not really prove anything about their introspective experiences. It does show that people can at times be gullible theorisers, but what this fact points to is that we should be careful when introspecting and perceiving, not that introspection and perception are bad tools.

So why does Dennett deny that the reason people have different descriptions of their internal worlds is because they have different types of minds? We argue that he is guilty of committing the Typical Mind Fallacy. Dennett makes the following claim:

I suspect that when we claim to be just using our powers of inner observation, we are always actually engaging in a sort of impromptu theorising-and we are remarkably gullible theorizers, precisely because there is so little to ‘‘observe’’ and so much to pontificate about without fear of contradiction. (ibid, p.68)

The key claim to note from above is Dennett’s claim that ‘there is so little to observe’ when we introspect. We argue that we should take Dennett at his word here. When he introspects there are no images to observe because he, like 5% of the population, is a non-imager. Both of the authors of this paper report that they find little to observe when they introspect. When they introspect they experience virtually no mental images; almost all thought is in terms of internal talking, although from time to time they do experience some mental images. So from an introspective point of view they can understand Dennett’s more extreme position, that of having no mental images. We can see why Dennett would believe that introspection involves a kind of unconscious theorising. The important point is that while Dennett and David Berman and David King are drawing from their own experiences, the reports which have been gathered from introspective psychologists indicate that not everybody shares the same experiences as Dennett. We argue, and will establish empirically, that people who are eidetic imagers will find Dennett’s claims absurd. They are right to view Dennett’s claims absurd from the point of view of their own minds. However, they would be wrong to think that Dennett is incorrect about his own mind; Dennett’s mistake was unconsciously generalising from his own mind to all minds. We will illustrate in the next section that Dennett’s views on mental imaging are not only derived from his own experiences but are also derived from theoretical considerations.

Section 3: Dennett on Rotating Mental Images

In chapter 10 of Consciousness Explained Dennett discusses some experiments which have been done on the rotating of mental images. The experimental data he discusses is extremely interesting. The first experiment is noteworthy because one of the authors (Dave King) was unable to perform the experiment at all because of a difficulty in calling up mental images. In the experiment subjects are asked to check if two objects beside each other but at different angles are the same shape.

The subjects typically reply that they are. When asked how they know, they reply that they rotated one of the objects in their mind’s eye and superimposed it on the other. Now obviously this could be explained away as being just a way of talking which the subjects have. However, further experimental research casts doubt on this view. Subjects were asked to rotate an object which was at a 45-degree angle to an object beside it to see if they were the same size and shape. Subjects were then asked to rotate an object at a 90-degree angle to the object beside it to see if they were the same size and shape. The idea was that, assuming that subjects rotated the objects in their mind’s eye at the same speed, then this would take twice as long. The experimenters (Kosslyn, 1980) found that it did indeed take twice as long to rotate an object through a 90-degree angle as through a 45-degree angle. This would appear to show that some people do indeed think with mental images.

Dennett is primarily worried about explaining these facts in a manner which does not commit him to the existence of a Cartesian Theatre. He gives a theoretical account of how we can explain this experiment in terms that do not presuppose the existence of the Cartesian Theatre. When discussing the human ability to rotate mental images Dennett compares it with the ability of a CAD system to rotate various shapes because of its Cathode Ray Tube. He asks us to imagine a blind engineer using a CAD system as a prosthetic device to rotate images. The blind person uses braille to communicate with the CAD system. This CAD system which he calls Mark 1 CADBLIND will be fitted with a computer vision system, complete with TV camera aimed at the Cathode Ray Tube. This computer visual system will be able to read the shapes on the Cathode Ray Tube and communicate the results to the blind engineer. Dennett goes on to argue that if we can design a Mark 1 CADBLIND system, then developing a Mark 2 CADBLIND will be easy:

We just throw away the CRT and the TV camera looking at it, and replace it with a simple cable. Through this cable the CAD system sends the Vorsetzer a bit-map, the array of zeros and ones that defines the image on the CRT. (ibid p 291)

So after a CAD system performs its calculation it passes the information to the Vorsetzer (visual system) and the information is translated. Dennett notes that we are not really saving much in terms of the calculations which still need to be done, we are just getting rid of some unnecessary hardware. He therefore proposes a Mark 3 CADBLIND system which actually saves on calculation:

So our Mark 3 CADBLIND will exempt itself from huge computational tasks of image-rendering by taking much of what it “knows” about the represented objects and passing it on to the Vorsetzer subsystem directly, using the format of simple codes for properties, and attaching “labels” to various “places” on the bit-map array, which is thereby turned from a pure image to something like a diagram. Some spatial properties are represented directly-shown-in the (virtual) space of the bit map, but others are only told about by labels. (ibid p293).

Here Dennett notes that such cancelling out only works if the two systems that need to communicate speak the same language. There would be a problem if the information which the CAD system had was not in a format that the Vorsetzer could use. Dennett argues that given that the human brain was designed by the tinkering processes of natural selection we should expect to find such difficulties of communication between the different areas of the brain. He speculates that since diagramming is an effective way of communicating the brain may use such processes. He argues as follows: ‘Diagrams do indeed amount to re-presentations of the information-not to the inner eye, but to the inner pattern recognition mechanism that can also accept input from the outer eye (ibid, p.293).

Twenty years after Dennett wrote Consciousness Explained experiments by Kosslyn have confirmed that two-thirds of the brain area that is lit up when a person visualises (the occipital lobe) is also lit up when a person forms a mental image.

Not everyone accepts Kosslyn’s results (see for example Pylyshyn 2003), however a substantial majority do. It has furthermore been shown that when people form mental images geometric patterns of these images are formed in the brain (Kosslyn et al. 2006). Experimental work has also been done on monkeys which shows that topographic images are formed on their visual cortex when they view patterns of lights which are flashed to them by experimenters. (Kosslyn et al., 2006)

Notably Dennett, despite arguing for an architecture similar to Kosslyn’s, draws a different conclusion. Kosslyn believed that these experiments showed that people rotated such images in their mind’s eye. Dennett, however, drew an entirely different conclusion:

Or in other words, it is asking whether any of the pixel-demons want to tell it, “color number 37 here”. All the red is gone-there are only numbers in there. In the end, all the work in a CADBLIND system must be done by arithmetic operations on bit strings, just as we saw at the lowest level of Shakey in Chapter 4. And no matter how quasi-pictorial or imagistic the processes are that eventuate in the Vorsetzer’s verbal answers to questions, they will not be generated in an inner place where the lost properties (the properties merely “talked about” in the bit map) are somehow restored in order to be appreciated by a judge that composes the answers…People are not CADBLIND systems. The fact that a CADBLIND system can manipulate and inspect its “mental Images” without the benefit of a Cartesian Theatre doesn’t by itself prove that there is no Cartesian Theatre in the human brain, but it does prove that we don’t have to postulate a Cartesian Theatre to explain the human talent for solving problems in “the mind’s eye”. There are indeed processes that are strongly analogous to observation, but when we strip down Kosslyn’s CRT metaphor to its essentials we remove the very features that would call for a Cartesian Theatre. (ibid, p. 297)

Dennett is in effect arguing that while it may seem to some people that they are forming mental images in their mind’s eye, closer inspection reveals that they are doing no such thing. He is trying to explain away people’s verbal statement that they are forming mental images. Most people find Dennett’s view on this topic a bit strange. They can understand how Dennett can treat other people’s verbal reports using the heterophenomenological methodology. Such an approach treats people’s verbal reports as being epistemically on a par with the verbal reports of Shakey the robot. However, the problem which most people have with Dennett’s characterisation of mental images comes from the first-person point of view. Independent of my verbal reports to others, if I see a purple cow in my mind’s eye, then I see it. Consider by analogy a table that I see on front of me. It could be argued that despite appearances the table is really just a colourless collection of quarks and gluons. Nonetheless, despite this fact, I still see a table on front of me. Likewise, while my mental image of a purple cow may be caused by messages to my occipital lobe from the temporal lobe, what I see is a purple cow. Dennett’s denial of mental images is only explicable from a first-person point of view if he is in fact incapable of forming such images. If he experienced vivid images then surely he would find his own CAD, and Shakey thought experiments, less impressive than he does.

He goes on to ask us to perform the following introspective experiment:

Here is a simple test to remind us of how limited our imaging abilities actually are: In your mind’s eye, fill in the following three by three crossword puzzle, writing the following three words in the columns, starting with the left column: GAS OIL DRY. (ibid p.295)

He notes that if written on a page the words would pop out whereas in the mind’s eye they do not. Here he is guilty of the typical mind fallacy. He assumes that because he cannot do it, nobody can. He admits there may be variation in people’s abilities to do crossword puzzles in their mind’s eye, and even says that some people may be better imagers than others. However, in the next sentence Dennett reminds us that in the ultimate sense it is all tell and no show (ibid, p. 295). In other words, we do not really use mental images to solve the crossword puzzles. So here again we suggest that the fact that Dennett is a non-imager plays a massive role in the theoretical views he holds about the nature of mental imagery.

Oliver Sacks recently spoke about a patient of his doing crosswords in her mind’s eye. I will give the whole quote here, because it strongly contrasts with Dennett’s view:

I was reminded, when Lillian told me of this, of a patient I had seen in the hospital some years before, who overnight become totally paralyzed from a spinal cord infection, a fulminating myelitis. When it became evident that no recovery was forthcoming she fell into despair, felt that her life was over-not only the great things of life but the little familiar pleasures of each day, like doing the New York Times crosswords, to which she was addicted. She requested that the Times be brought to her each day so that she could at least look at the puzzle, get the configuration, run her eyes along the puzzle, get its configuration, run her eyes along the clues. But when she did this something extraordinary happened, for as she looked at the clues, the answers seemed to write themselves in the spaces. Her visual imagery strengthened over the next few weeks, until she found that she was able to hold the entire crossword and its clues in her mind, after a single, tense inspection, and then solve it mentally, at her leisure later in the day. This became a source of great solace to her, in her paralysis; she had no idea, she told later told me, that such powers of memory and imagery were available to her. (Oliver Sacks: The Mind’s Eye p. 24)

This example is obviously anecdotal, and a verbal report cannot be simply assumed to be a correct description of an experience. Nonetheless, since introspective reports, behavioural evidence and neuroscientific evidence do indicate that people have different ranges in their imaging abilities, we have no reason to doubt Sack’s patient. We suggest that Dennett could benefit from reflecting on the variation of people’s mental imaging and that such reflection is necessary to stop him from unconsciously projecting his own type of mind onto all other people’s minds. One of the authors of the present paper (Dave King) tried Dennett’s introspective task of imaging crosswords. He described his experiences as follows:

When trying to imagine the crossword in my mind visual images played a limited role. I spelled the words out ‘’verbally’’ in my mind, and sometimes could see a glimpsy word in my mind’s eye. And I figured out what the words were by a process of memory, spelling out each word ‘‘verbally’’and then through memory figuring out what each horizontal word would be. Some imagery was present, I vaguely ‘‘saw’’ a square and red dots appear where I would imagine the words would be if in a crossword. Looking at each red dot seemed a physical experience; I could feel my eye balls move as I looked at the dots. The images did not seem to play any role in figuring out the words though as I said, images were present a lot of the time.

In an earlier paper co-author of this paper David Berman described his own experiences of trying to form a mental picture of a similar game:

Here is another similar test for image impairment. I say: let’s play noughts and crosses. You agree. But instead of your playing it on paper, I ask you to play it in your head or mind’s eye, using the a, b, c and 1, 2, 3 grid, as used by chess players. Here again the weak or non-imager is going to show his impairment; whereas the photographic and eidetic imager 10 could not only easily play noughts and crosses in his head, but (amazingly to me) actual chess as well. Of course, working out the place of a letter in a word, or playing mental noughts and crosses, is not a task that comes up that often. But what does arise rather more normally is a question like:‘Dad, how do you spell the word . . . ?’ For a low imager, that isn’t difficult if the word is short. But it is extremely difficult, as I know from my own experience, if the word is long, for then it is hard to be sure which letter one has reached by the middle or end of the word. Again, it is easy enough to do it if you can write the word down, and that is precisely what the strong imager can do, although in his mind’s eye. (Philosophical Counselling for Philosophers: p. 7)

The views of Dennett, Sacks’ patient, David Berman and Dave King are all different. Dennett, because he is, we believe, a non-imager, assumes that the differences result from theorising on our limited vague internal experiences. We argue that he believes this because when he introspects he experiences no mental imagery and incorrectly assumes that all people have minds which are the same as his.

Section 4: Dennett as a Heterophenomenological Subject.

Dennett discusses pain in Chapter 3 of Consciousness Explained; the chapter is called ‘A visit to the phenomenological garden’. When discussing pain Dennett asks us to perform the following introspective experiment:

Close your eyes and imagine that someone has just kicked you, very hard, in the left shin (about a foot above your foot) with a steel-toed boot. Imagine you almost faint, so nauseatingly sharp and overwhelming is the jolt of pain you feel. You imagined it vividly; did you feel any pain? Might you justifiably complain to me that following my directions has caused you some pain? Some find it somewhat disturbing, and others find it a rather enjoyable exercise of the mind, certainly not as unpleasant as the gentlest pinch on the arm that you could call pain. (Consciousness Explained, p. 60)

Dennett then asks the following two questions:

(1) Imagine you dreamt of experiencing the same kick in the shin that you imagined in your introspective experiment, and you woke up clutching your shin. Are dreamed pains real pains, or a sort of imagined pain?

Dennett’s answer is that dream pains are at least something that we do not like having, whereas imagined pains are something nobody minds having. He then asks another question:

(2) Compare dream pains to pains that arise in you while you sleep, when you roll over and inadvertently twist your arms in an awkward position, and then, without waking up, without noticing it at all, roll back into a more comfortable position. Are these pains? Dennett is ambivalent in his answer to this question. He only seems to ask the question to illustrate how unclear the notion of pain is; that despite some philosophers thinking that qualia like pain are immediately known, the experience is in fact much more vague than we think.

To support our view that Dennett is a non-imager inadvertently committing the Typical Mind Fallacy we asked 12 people to do his introspective task. We aimed for a qualitative approach; we asked our participants to detail their experiences in as rich a manner as possible. We argue that such an approach is in keeping with the manner Dennett answered his own question. We sent our introspective tests to over 40 people and used the results from the 12 people who answered. Our aim is to merely illustrate the divergences which occur within our small sample. We think that the divergences are suggestive and warrant being further researched on a large scale and with more rigorous statistical analysis which takes account of age differences, sex differences, and cultural differences, educational level etc. For the purpose of this paper we argue that our small sample is enough to show that Dennett is wrong to generalise from his own type of mind to the structure of all minds.

Dennett’s manner of answering his own question combined with other studies reveals a lot about his kind of mind. He argues that imagined pain is something that people do not mind having, while dreamed pain is something people do mind having. Most of the people who answered our questionnaire did not agree with him on this. We also think that Dennett’s account reveals that his dream experiences are more real for him than his imagined experiences. This is significant because one of the authors of this paper, David Berman, has evidence that non-imagers typically have vivid dream experiences[4]. This fact was also observed by the psychologist Bill Faw[5]. So the fact that Dennett admits by implication that his dreams are more vivid and real than his imagination fits well with our claim that he is a non-imager.

So we argue there are four key facts which indicate that Dennett is a non-imager who is guilty of unconsciously assuming that all people have the same mental architecture as himself. (1) There is evidence of great philosophers making this mistake in the past[6]. This obviously does not prove that Dennett is guilty of making the same mistake; it is merely intended to establish historical precedence and to open up the theoretical possibility that Dennett may be guilty of the same mistake. (2) The fact that Dennett describes himself in terms of Shakey and Mark 3 CADBLIND, creatures who have no imagery whatsoever indicates that he, like them, has no mental imagery. (3) The study of Reisberg et al.(2002) indicates that non-imagers typically remain sceptics about mental imagery ability despite the overwhelming evidence in favour of the existence of mental imagery.(4) Dennett’s confession that he finds dreams pains more vivid than imagined pains is consistent with the findings of Faw (1997) and Berman (2009) that non-imagers typically experience vivid dreams.

Section 5: Dennett: Are Dreams Experiences?

The psychologist Brian Faw has argued that typically people who are non-imagers experience vivid dreams. A similar pattern has been noted by David Berman in studies of people’s introspective abilities over the years. In his 2009 “A Manual of Experimental Philosophy” two of his subjects were non-imagers and both of them reported having strong dream experiences. One of his subjects Timo made the following reports to Berman:

I must confess that I cannot see any images in my mind, except when I fall asleep. But I can for instance freely wander around my childhood home in Vaasa, from room to room, and I can ‘see’ quite exactly what was there. I go back to that flat. But I do not have visual images which are comparable with those of dreams. I just remember’… I suspect that people call the pictures of imagination pictures even if they do not see any pictures. They conventionally call them so…David, believe me, I don’t see any pictures. I do the construction conceptually, and I remember what I thought in the (black) visual space. When I walk through my home, I use words. Believe me I see nothing except in some wide figurative sense perhaps. But no images. It is all about thinking not seeing. (A Manual of Experimental Philosophy: pp.63-66)

We can see from Timo’s report that his view of images as a type of metaphor is similar to Dennett’s view. Like Dennett, his report of dreams indicates experiences much more vivid than his non-imaging abilities when awake. The other non-imager in Berman’s report made similar claims. Marek, who reported that he is a non-imager made the following claim about his dream experiences:

Yes I do have visual dreams, in fact the images (plus voices, of course) are so vivid that I try and do interact with the people in the dreams. So like Descartes predicted, I am fooled in my dreams and take them for reality. Sometimes though I can tell that I am dreaming when something very illogical happens. (ibid p. 70).

We have argued in this paper that Dennett was a non-imager and that like a lot of non-imagers he had vivid dream experiences. The evidence we cited above from Berman and Faw indicates that there is a correlation between non-imagery and strong dream experiences. We have also argued that Dennett’s discussion of the difference between imagined pain and dreamed pain further illustrated our point. He claimed that dreamed pain would be more vivid than imagined pain and this claim nicely fitted in with our empirical data that non-imagers have vivid dream experiences[7].

There are, however, two objections which can be made to our claim. (1) Our claim that Dennett has vivid dream experiences is inconsistent with our claim that he denies that mental images exist. If Dennett does indeed experience mental images while dreaming then this seems to undermine our claim that he denies the existence of images because he never experiences them. (2) Dennett has written two different papers about the nature of dream experiences, and his views on dream experiences do not, on the face of it, sit well with our view that Dennett has strong dream experiences. We will deal with Dennett’s theoretical papers on dreams first, and then after that answer question (1).

In Dennett (1978b) he aims to undermine the authority of the received view that dreams are experiences. The received view claims that dreams are experiences that occur during sleep, and that these experiences consist of sensations, thoughts, images and feelings which are organised in a narrative form occurring somehow in awareness even though we are not consciously aware at the time. Dennett aims to cast doubt on the received view and to outline his view of experience and memory which he will incorporate into his physicalistic theory of consciousness.

Dennett notes that the received view is an empirical theory; and that there is some anecdotal evidence which goes against the received view. For example, people are often woken by an alarm which they hear in their dream; however they were undergoing REM hours before. So unless the dreamer has precognition then he cannot have dreamt of the alarm at the said time. Dennett claims that this shows that dreams are mere recollections, not something we actually experience. Dennett conjectures that science may show that dreams are like déjà vu, i.e. it only seems like we had them before (Dennett: Are Dreams Experiences p. 155). We may, he speculates, have dream memories constructed in our brains ready to be ‘recollected’ upon waking.

Dennett argues that the difference between the received view and his alternative (cassette) conjecture is that in the new view, unlike the old view, there is nothing it is like to have a dream (though there is something it is like to remember a dream). For Dennett there is nothing to distinguish between the received view and the cassette alternative. He notes that only our common sense intuition counts against his alternative, although he argyes that common sense intuitions should not decide a scientific matter.

Dennett points out that one criterion which counts against the received view is ordinary language. We would normally say that to experience something we must be conscious of it. On the received view we supposedly have unconscious experiences. So this is reason to prefer the alternative view because it is less vulnerable to conceptual confusion than the previous view. He offers a further thought experiment which he claims shows that dreams may not be experiences. Suppose a person as a result of some brain twinge claims to have seen a ghost at 12pm. Suppose further that we are with the person at 12pm and between 12pm and 12.14pm he behaves normally and gives no indication of seeing a ghost. Now suppose that at 12 15pm this person gets agitated and claims that he has seen a ghost at 12pm. Since the person gave no indication of this at 12pm we will assume that the person at 12 15pm, as a result of brain injury, has a hallucination of a recollection (ibid, p.20). Dennett claims that this hallucination story can have effects for the theory of dreams. All normal dreams do not get reported until after the fact. So we do not have sufficient evidence to say people are experiencing dreams. He makes an exception when it comes to nightmares because we have behavioural evidence in the form of increased heart rate, moans, cries. He claims that bad dreams would not be experiences because of lack of behavioural evidence at the time we claimed we experienced them, though he claims we could remember the dream in agony (ibid p.20).

He argues quite plausibly that if paralysis is only peripheral and more central processes are lit up, e.g. the visual system is lit up (which it is), this may count towards us saying that dreams are experiences. However, given that the visual area is lit up in blind sight and hysterical blindness this shows that we cannot say for certain that a lit up visual area means that we are having dream experiences. He notes that it is an open theoretical question whether dreams are experiences.

He argues that we will want to investigate four things if we are to construct an accurate theory of dreams.

(1) The role of experiencing in guiding current behaviour.

(2) Our current abilities to say what we are experiencing.

(3) Our recollective capacities to say what we are experiencing.

(4) The functional saliencies which emerge from empirical investigation.

So in effect Dennett argues that we cannot at present decide between the alternatives however, any alternative must be established empirically.

In his later paper “What is Dreaming for, if anything?” (2013) Dennett defends this Malcolm-type view on dreams against an alternative proposed by psychiatrist Allan Hobson whose theory of the nature of dreams is a version of the received view. Dennett again offers a series of arguments which he thinks show that his view is as viable an alternative as the received view. The one area where he expands upon his earlier theory is by emphasising the theoretical possibility that linguistic competence plays a central role in developing our hallucinations of dream experiences.

It might be felt that Dennett’s view outlined in his two papers on dreams which indicates that he does not think that dreams are experiences is strong evidence that our view that he is a vivid dreamer is incorrect. We, on the contrary, think that Dennett’s papers on dreams support our position rather than going against it.

It is worth noting that the empirical evidence that non-imagers have vivid dreams seems on the face of it to be a strange fact. If a person is incapable of having mental images then it is odd that they can have vivid dreams which would involve imagery. However, from a phenomenological point of view mental images are different than hallucinations. People never take mental images for the real thing (even eidetic imagers do not), whereas people typically confuse hallucinations for real experiences. The fact that dreams are typically confused with reality indicates that they have the quality of a hallucination rather than of imaging. Dennett, while claiming that dreams may not be directly experienced, does indicate that we experience our memories of them and that they are hallucinations of recollections of something we never experienced (ibid, p.20). But we experience the actual hallucination, and the hallucination of a bad dream can be remembered in agony (ibid, p.20). What this means is that although the hallucination is a false memory we still experience the actual hallucination and the hallucination can leave us in agony. So again this view is actually consistent with Dennett’s claim that imagined pain is not as severe as dreamed pain. We will not evaluate Dennett’s defence of Malcolm’s claim that dreams are not directly experienced because it is not relevant to this paper and Dennett admits it is only a theoretical possibility. It is enough to note that nothing in Dennett’s paper is inconsistent with our claims that Dennett is a non-imager who has vivid dream experiences. Dennett, even in his paper’s on dreams, indicates that even if we consider dreams as hallucinated memories we can still experience these hallucinations in agony. This contrasts strongly with his claim that people cannot imagine real pain in his Consciousness Explained. It is consistent with Dennett’s claim that dreamed pain is something we mind having. It is also consistent with our view that Dennett is a non-imager who is a vivid dreamer. Dennett is guilty of assuming that his idiosyncratic psychology is representative of human minds. He is not alone in this. Berman has argued convincingly that Locke and Berkeley were also guilty of it. We think it is worth researching whether other thinkers in the philosophy of mind like Nagel and McGinn are guilty of making a similar mistake. Philosophers like Dennett and Quine have argued that philosophy should become more naturalistic and empirical. We aim to extend this empiricism to the study of the individual minds of philosophers and how their minds unconsciously influence their philosophical theories.

Section 6: Real Seeming

In his Content and Consciousness Dennett talks about the fact that while it may seem to some people that they have mental imagery, closer examination reveals that what they call a mental image is really only a description. Twenty five years later in his Consciousness Explained when discussing Kosslyn’s experiments on mental imagery, Dennett noted that despite appearances mental imagery is really all tell and no show. One curious thing about Dennett’s view is the fact that he claims that despite the way things seem mental imagery is really a mental description. What is strange about this view is the fact that a description can seem like an image. This is a very odd way to understand the word ‘seem’. A paradigm example of an x seeming like it is a y is given by Descartes. He talks about how a stick which is in transparent water will seem to be bent because of light refraction, though in reality the stick is not bent. What Descartes means by the words ‘seems to be’ is the same as ‘appears to be’; and this of course is the standard meaning of ‘seems to be’. However, even to a weak imager like me, it is patently obvious that mental images are nothing like mental descriptions. If something really seemed (as in appeared) to me like an image, then it follows that I would have an experience of something image-like, and a description is in no way image-like. This leads to the question of what Dennett could possibly mean when he admits that it atleast seems to some people that they experience mental images?

In Consciousness Explained Dennett carefully explains what he means by the word ‘seems’; evaluating his views on this will help clarify his strange beliefs about the nature of images. In Chapter 5 Section 5 of Consciousness Explained Dennett discusses the colour phi experiment[8]. In this discussion he makes explicit his strange views on the nature of ‘seeming’. The colour phi phenomenon is apparent motion. We see examples of it on our television screen every day, where a series of still pictures are flashed one after the other at a certain speed to create the illusion of motion. Dennett discusses a simple example of colour phi where two spots separated by as much as 4 degrees of visual angle are flashed rapidly, creating the illusion of one spot moving back and forth rapidly (ibid, p.114). Kolers and Grunau (1976) did a phi experiment with two dots, one red and one green, flashing on and off. This gave the illusion of a red spot starting to move and changing colour to green mid-passage. Since the red dot is not moving and does not turn into a green dot we need to ask what is going on with this illusion. As the red dot moves we see it turn green as it moves towards its destination. The question is: how do we see the dot turn green before we actually see the green dot? One might think that the mind must first register the red dot and then the green dot and after that point the apparent motion must be played before the mind’s eye. To think this, way Dennett warns, is to demonstrate that one is still in the grip of the metaphor of the Cartesian Theatre (ibid p. 115).

To loosen the grip of this picture on our minds Dennett discusses two fictional processes which one could attribute to the brain. He calls them the Orwellian Process and the Stalinesque Process. The Orwellian Process occurs when I misremember something because my brain tampers with what I remember so that I no longer remember accurately. The Stalinesque Process is where the brain projects a false picture of reality into the mind’s eye. Dennett notes that while a distinction between Orwellian and Stalinesque processes makes sense in the external world it is an illusion to assume that it makes sense as an explanation of what is going on at the level of the brain.

Let us think of both of these processes as they apply to the case of colour phi. In the Orwellian case we did not see the apparent motion; our brain merely revised our memory and informed us that we did see the motion. In the Stalinesque case we unconsciously registered the two dots and afterwards our brain created a kind of mock event for us to watch. Dennett notes that once we give up the notion of Cartesian Materialism, we will see that there is no answer to the question of whether the Orwellian or Stalinesque process took place. He puts things as follows:

So here is the rub: We have two different models of what happens to the color phi phenomenon. One posits a Stalinesque “filling in” on the upward, pre-experiential path, and the other posits an Orwellian “memory revision” on the downward, post-experiential path, and both of them are consistent with whatever the subject says or thinks or remembers…Both models can deftly account for all the data-not just the data we already have, but the data we can imagine getting in the future (ibid, pp. 123-124)

So there is no fact of the matter which can decide between the two different stories. Dennett argues that the reason that we cannot decide between the two accounts is that there is really only a verbal difference between them. With Dennett’s rejection of Cartesian Materialism and his alternative multiple-drafts theory of consciousness we can no longer draw a non-arbitrary line to decide when an event becomes conscious. There is therefore no fact of the matter as to whether an Orwellian or a Stalinesque process took place.

When Dennett claims that we cannot decide between the Stalinesque and Orwellian alternatives we are left with what seems like a mystery. In the external world a red object is not really moving and turning into a green object, yet Dennett is also denying that a Stalinesque show trial is played before the mind’s eye. So the obvious question is: where does the movement of the ball occur? Dennett’s answer is that the ball does not move and turn green it only seems to. However, to say that a ball seems to move is to say that people have an experience of the ball moving. And this leads us back to our original question: what generates this experience, and how is it generated? Dennett thinks that this is a bad question because the brain does not need to create an experience of the ball moving; it merely has to form a judgment that such movement occurred:

The Multiple Drafts model agrees with Goodman that retrospectively the brain creates the content (the judgment) that there was intervening motion, and that this content is then available to govern activity and leave its mark on memory. But the Multiple Drafts model goes on to claim that the brain does not bother “filling in” the blanks. That would be a waste of time and (shall we say?) paint. The judgment is already in, so the brain can get on with other tasks. (ibid, p. 129)

This claim of Dennett’s is extremely strange. He is claiming that the brain judges that the motion occurred. However, as a matter of fact, we do not experience the motion; we only think we do. The obvious reply to this is to categorically state that I do experience the movement and I judge that the movement occurred based on this experience. In other words, the experience is prior to the judgment. The experience is not of a fact in the external world (where no movement occurred), it is rather an experience of a person’s subjective qualia. When Dennett denies that it is the experience that leads to the judgment, he is leaving the phenomenal experience out and is focusing entirely on access consciousness.

The claim that Dennett is denying the existence of phenomenal consciousness is on the face of it an incredible claim. So before proceeding it is important that we show that this is indeed Dennett’s position. To demonstrate that this is indeed Dennett’s position I will now provide detailed quotes from him to make clear his position. When discussing phenomenal space Dennett makes the following claim:

Now what is phenomenal space? Is it a physical space inside the brain? Is it the onstage space in the theatre of consciousness located in the brain? Not literally. But metaphorically? In the previous chapter we saw a way of making sense of such metaphorical spaces, in the example of the “mental images” that Shakey manipulated. In a strict but metaphorical sense, Shakey drew shapes in space, paid attention to particular points in that space. But the space was only a logical space. It was like the space of Sherlock Holmes’s London, a space of a fictional world, but a fictional world systematically anchored to actual physical events going on in the ordinary space of Shakey’s “brain”. If we took Shakey’s utterances as expressions of his “beliefs”, then we could say that it was a space Shakey believed in, but that did not make it real, any more than someone’s belief in Feenoman would make Feenoman real. Both are merely intentional objects. (Ibid, pp. 130-131)

The above passage is very instructive. It speaks to our topic of mental images and again shows that Dennett thinks of them as theorists’ fictions. Furthermore, his invoking of Shakey, who despite its verbal reports is not experiencing any items in phenomenal space, shows that Dennett thinks that we, like Shakey, despite our verbal reports are not experiencing anything in phenomenal space. Dennett is claiming that our brains may tell us that we have such and such experiences, and as a result of this brain report we form the judgment that we saw a red light move and turn into a green light. However, this judgment, despite appearances, is not grounded in a phenomenal experience.

It is worth noting that a lot of thinkers misinterpret Dennett’s claims on ‘seeming’ and colour-phi as indicating that he denies that we experience colours. This is not the case. Dennett’s arguments above only apply to colour hallucinations, Dennett tells a different story about how we perceive colour in the external world.

To understand Dennett’s views on colours it is helpful to think in terms of the primary quality distinction. One of the central motivations for claiming that the world is in your head is the existence of secondary qualities. When one looks at a beautiful garden one sees a variety of different colours: like the bright yellow sun-flower, the green-grass, the multi-coloured butterflies, the blue-sky and the bright-yellow-sun. Since the seventeenth century people like Galileo and Locke have been telling us that colours do not exist in the mind independent world. Colours are effects of light reflecting off objects and hitting our retinas in a variety of different ways. The majority of scientists since Galileo accept this dichotomy between primary and secondary qualities. Primary qualities are: Solidity, Extension, Motion, Number and Figure, while the Secondary qualities are: Colour, Taste, Smell, and heard Sounds. One consequence of accepting this picture is that the world is not as it reveals itself to us in our experience furthermore colours do not exist in a mind independent world. A further consequence is that we have a rich world which we experience consisting of taste, smells and colours but this world exists only within our minds. So on this view we have a subject, who is presented with certain experiences, and only some of those experiences correspond with a mind independent entity. The cartesian materialist who accepts this world picture has a difficult job on his hands. Nowhere in the brain is the experience of a blue sky located or a yellow daffodil located. He may be able to provide neural correlates for these experiences but he will not be able to point to the spatio-temporal location where the experience is and the subject is located. So presumably the cartesian materialist will have to argue for a strong emergence thesis.

Rather than going down this road Dennett interprets the dichotomy between primary and secondary qualities differently than most contemporary theorists. Dennett has discussed the status of colours throughout his philosophical development: in particular in his 1968 Content and Consciousness, 1991 Consciousness Explained and in his 2005 Sweet Dreams: Philosophical Objections to a Science of Consciousness. I will now try to give a synoptic view of Dennett’s views on the topic of colours. In his first major discussion of colours he noted that while most believed that colours are secondary qualities and do not exist in the external world there are reasons to doubt this conclusion.

He centres his criticism in terms of language and what we are referring to when we use colour words. If we view colours as secondary qualities we are committed to the view that when I refer to something red I am referring to something within my mind. Now if we accept this view then when two people claim that they are referring to something red then they we don’t know whether they are referring to the same thing, as their inner experience of red may be different and, we cannot decide because we would have nothing public to compare their experiences to. Now if we do not want to admit the possibility that a teacher can never know when his pupil has actually learned the meaning of the word ‘red’ we must admit that the reference of colour words is to public observable entities.

One difficulty is that if one accepts the solution to the sceptical problem of colour reference by arguing that words refer to publically observable entities is that it leaves us with a conundrum of where we say that colours exist. They don’t exist in the mind independent world, and they don’t exist in the mind, and there is nowhere else to exist. So one is lead to the silly conclusion that colours do not exist anywhere. This conclusion must be wrong; and Dennett correctly notes that colour words refer to publically observable entities that one can be right or wrong about (Content and Consciousness, p. 161). So they seem to exist and seem to exist in a publically observable sphere.

For Dennett since colours are publically observable entities which we can be right or wrong about then they must be a property of the external world. This leaves Dennett with the question: what property exactly are they? He notes that colours are not reflective properties of surfaces which can be cashed out at a sub-atomic level. This is because:

“Although the sub-atomic characteristics of surfaces that reflect light predominantly of one wavelength can now be described in some detail, those different types of surface do not correspond neatly to the colours we observe things to be.” (ibid, p. 161)

Also different wavelengths of reflected light can cause the same colour experience in a person. So the job of characterising what property colours actually are is more complex than one might assume. Dennett notes that when a person is referring to red we will need to cash-out what property they are referring to in terms like: The person is referring to the reflexive property of x or y or z…(and the disjunction associated with one colour might be very long).

Dennett asks us: if the disjunction of properties which can be associated with a person’s experience of colour have little in common with each other, are we driven to the conclusion that colours do not exist? To think through this possibility considers colour blind people who have poorer discriminative capacities than us and a hypothetical alien who has colour discriminative capacities which are greater than ours. He notes that we would say that the colour blind man who may say that ripe (red for us) apples and grass are the same colour is suffering from a cognitive illusion. On the other hand if an alien had greater discriminative capacities than us so that it would constantly see things as changing colour, we would also say that he was experiencing colour illusions. This is because the meaning of colour terms is defined in terms of OUR discriminative capacities; which means that WE judge certain things in the world to be red, green etc. So relative to our form-of-life these other people would be suffering from a form of cognitive illusion.

Dennett concludes with the following statement:

Colour is not a primary physical property like mass, nor is it a complex of primary properties, a structural feature of surfaces. Nor again is it a private ‘phenomenal’ quality or an ‘emergent’ quality of certain internal states. Colours are what might be called functional properties. A thing is red if and only if when it is viewed under normal conditions by normal human observers it looks red to them, which only means: they are demonstrably non-eccentric users of colour words and they say, sincerely, that the thing looks red. There saying this does not hinge on their perusal of an internal quality, but on their perception of the object, their becoming aware that the thing is red (ibid, p.163)

I am not really sure whether Dennett really manages to avoid the problem of where the experience of red is located. However it should be obvious that he is not denying that colours exist, rather he is claiming that they are not paraded in a Cartesian Theatre.

In Part 1 of this paper we have shown that Dennett is denying that mental images exist. He treats us as robots like Shakey whose programming forces us to judge that we experience mental imagery. He explains away the fact that people report that it seems to them that they experience mental imagery by denying that ‘real seemings’ exist. Dennett’s account fails. He cannot explain why some people report experiencing vivid mental imagery while others report that they do not. His account fails to account for heterophenomenological reports of ordinary human subjects. Furthermore, when judged from a heterophenomenological point of view, his own reports are consistent with those we would expect from a non-imager. So we conclude that when it comes to mental imagery Dennett is guilty of making the Typical Mind Fallacy.

In our introduction we discussed Berman’s Typology: which divided philosophers into three main types. We argued that Dennett was a combination of Type 2 and Type 3 thinkers. We have seen in Part 1 that Dennett denies that things like colour-phi phenomenon, afterimages, and mental images are presented before the mind’s eye. This denial is consistent with the type of claims made by William James. Dennett’s denials are strong indications that he is not a Type 1 Mentalistic Thinker like Descartes; rather, he is like William James, a Type 2 Bodily Thinker. In Part 2 we will show that while Dennett is primarily a Type 2 Bodily Thinker he is also to a lesser extent a Type 3 Socio-linguistic Thinker. We will show this by evaluating Dennett’s views on the nature of pain.

PART 2: DENNETT ON PAIN

Dennett primarily explored the nature of pain in the early days of his philosophical development between the years 1968-1978. His views on the subject of pain are subtle and understanding his views on the topic will give us an insight into the nature of Dennett’s type of mind. We will begin by first discussing his views on pain as developed in his 1968 doctoral thesis Content and Consciousness. We will then discuss his later views as developed in his “Why You Can’t Create a Computer That Feels Pain”. Once this is done we will show what his views reveal about the nature of Dennett’s mind.

On page 6 of Content and Consciousness Dennett denies the identity theory. He argues that pains are too different from brain states for one to be identified with the other. He further cites Putnam’s argument that the identity theory must be false because it leads to absurd counter- intuitive results. Thus, if identity theory were true, then this would lead to the absurd claim that only creatures with identical chemistry could think the thought that ‘Spain is in Europe’; this is surely false. Clearly a robot or an alien could think the thought that ‘Spain is in Europe’. So Dennett argues that the identity theory is false. However, without the identity theory we are faced with all of the problems of dualism (how do the mind and body interact etc.). He argues that a lot of people are drawn to the identity theory because it seems less problematic than the intractable dualistic picture. Nonetheless he argues that identity theory, like dualism, is false, so we need a new way of dealing with these problems.

Dennett’s suggestion is a kind of blending of Ryle and Quine. Ryle had long noted that it was a category mistake to try and reduce mind talk to brain talk because they belong to different logical types. Critics of Ryle had long noted that he never really spelled out what he meant by ‘different logical levels’ and things belonging to different ‘conceptual categories’. Dennett aimed to make sense of talk of the mental and the physical belonging to different categories by appealing to Quine’s philosophy of language as spelled out in Word and Object. Quine had noted that certain phrases, such as ‘for-the-sake-of’, are not translatable into the syntax of quantification, so had no clear identity conditions which would force us to be ontically committed to the existence of ‘sakes’. So, for example, we can say things like ‘for-the-sake-of-john’, but we cannot say whether there is one ‘sake’ or two. We cannot say of ‘sakes’ that they have attributes such as being ‘a good sake’, or ‘a big sake’ etc. Dennett argues that despite appearances, terms like ‘sakes’ are non-referential. Confusing terms which are non-referential with referential terms can result in a series of intractable problems. To see this he asks us to think of the term ‘voice’. ‘Voice’ is used in various different phrases and these phrases give the appearance that ‘voice’ refers to an entity in the world. So when, for example, it is said that ‘John has lost his voice’, if one is an identity theorist one will assume that ‘voice’ is identical with some physical process going on in John, that the word ‘voice’ refers to a physical process x. There are problems with this view of ‘voice’. Suppose one were to identify John’s voice with a particular fact about John’s vocal cords. This identity is not complete; there are digital recordings of John’s voice which will survive even after John has died. Given that the recordings are all in different mediums it makes little sense to identify ‘voice’ with vocal cords, and CD recordings, and records: all these various things have in common is a disposition to cause certain experiences in normal people. Do we say that ‘John’s voice’ denotes various different concrete objects, so that ‘John’s voice’ is a universal? Do we say that ‘John’s Voice’ is somehow identical with all the various instantiations? If so then it is hard to make sense of claims like ‘John’s voice is strained’, ‘John has lost his voice’ etc. When we say that ‘John has lost his voice’ do we mean that his vocal tracts are damaged, and that he has lost all recordings of his voice? Dennett claims that such silly questions can be avoided by accepting that ‘voice’, like ‘sakes’, and ‘dints’ are non-referential terms. They are ways of talking which are useful in some contexts but which do not carve nature at its joints. He suggests that we can treat ‘the mind’ in a similar way to ‘sakes’ and ‘voices’, useful ways of talking which do not pick out entities in the external world.

The concept of pain is one of the central concepts for any theory of the mind. Some people have used the concept of pain as a clear instance of identity theory. To be in pain state x is to be in neural state y. Dennett notes that 