Here, with two terms, a and b, being given as well as two functions, x and y, of these terms, it is assumed that a relation of equivalence exists between two situations defined respectively by an inversion of terms and relations, under two conditions: (1) that one term be replaced by its opposite (in the above formula, a and a-\); (2) that an inversion be made between the function value and the term value of two elements (above, y and a).

I often say that when you can measure what you are speaking about and express it in numbers you know something about it; but when you cannot measure it, when you cannot express it in numbers, your knowledge is of a meagre and unsatisfactory kind...

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Page 5 Of the three, the revolution in chaos applies to the universe we see and touch, to objects at human scale. Everyday experience and real pictures of the world have become legitimate targets for inquiry. Appears in 9 books from 1987-2007

Page 170 - Aristóteles ha establecido que se produce una analogía «when there are four terms such that the relation between the second and the first is similar to that between the fourth and the third. Appears in 9 books from 1971-2005

Page 149 - Here fertility is restored to the earth by first passing through the king's digestive tract: Ruganzu Ndori was living in exile in the kingdom of Ndorwa, a neighboring kingdom to the north of Rwanda. There he had taken refuge with his FZ (nyirasenge) who was married to a man from the region. In the meantime, because the Rwandan throne was occupied by an illegitimate usurper, Rwanda was experiencing numerous calamities. The crops were dying, the cows were not giving milk, and the women were becoming... Appears in 5 books from 1992-2005

Page 149 - ... numerous calamities. The crops were dying, the cows were not giving milk, and the women were becoming sterile. Ruganzu's FZ encouraged him to return to Rwanda, retake the throne, and save his people from catastrophe. Ruganzu agreed, but before setting forth on his voyage, she gave him the seeds (imbuto) of several cultivated plants (sorghum, gourd, and others) to restart Rwandan cultures. While en route to Rwanda, Ruganzu Ndori came under attack. Fearing that the imbuto would be captured, he... Appears in 4 books from 1992-2005

Page 38 The task of converting observations into numbers is the hardest of all, the last task rather than the first thing to be done, and it can be done only when you have learned, beforehand, a great deal about the observations themselves. You can, to be sure, achieve a very deep understanding of nature by quantitative measurement, but you must know what you are talking about before you can begin applying the numbers for making predictions. Appears in 3 books from 1983-2005

Page 215 - Light is the left hand of darkness and darkness the right hand of light. Two are one, life and death, lying together like lovers in kemmer, like hands joined together, like the end and the way. Appears in 26 books from 1974-2007

Page 36 ... Arthur, has been the revolution in complexity. "In a sense it's the opposite of reductionism. The complexity revolution began the first time someone said, 'Hey, I can start with this amazingly simple system, and look — it gives rise to these immensely complicated and unpredictable consequences.' " Instead of relying on the Newtonian metaphor of clockwork predictability, complexity seems to be based on metaphors more closely akin to the growth of a plant from a tiny seed, or the unfolding of... Appears in 4 books from 1992-2005

Page 11 Nonlinearity means that the act of playing the game has a way of changing the rules. Appears in 34 books from 1987-2005

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