Billionaire friends Elon Musk and Larry Page are reported to have a 'funny' relationship.

Musk apparently crashes at Page's house where they play video games together to pass they time. But the pair also argue about some major issues, including AI.

A new book by renowned MIT professor Max Tegmark recounts a heated debate between the two tycoons at a glamorous party in Napa Valley.

During the debate, Page accused Musk of being 'speciesist' for his apparently outlandish claims that killer robots could wipe out humanity.

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Elon Musk (left) and Larry Page (right) clashed over Musk's claims that AI will destroy humanity, causing the Google founder to label the Tesla founder as a 'speciesist'

The Google founder said Musk - who has spoken out about the dangers of artificial intelligence - was treating certain life forms as inferior because they were made from silicon and not carbon.

Professor Tegmark makes the claim in his book, titled 'Life 3.0: Being Human In The Age of Artificial Intelligence', Metro writes.

In it, he gives details of a clash between the two technology titans in the early hours of the morning at a party in Napa Valley in California.

A post-cocktail chat about a children's book between Professor Tegmark and Page soon escalated into an argument between Musk and the Google founder.

Described as a 'long and spirited debate', the two engaged in a war of words focusing around Musk's outspoken views on AI.

It appears Page did not appreciate Musk implying robot overlords would bring about a dystopian future in which humans are destroyed.

Professor Tegmark writes: '[Page's] main concerns were that AI paranoia would delay the digital utopia and/or cause a military takeover of AI that would fall foul of Google's 'don't be evil' slogan.

'Elon kept pushing back and asked Larry to clarify details of his arguments, such as why he was so confident that digital life wouldn't destroy everything we care about.

'At times, Larry accused Elon of being 'speciesist': treating certain life forms as inferior just because they were silicon-based rather than carbon-based.'

While Musk believes that robots are inevitable agents of death, Page is a passionate advocate of a utopian future where humans and robots co-exist in harmony.

In his book Life 3.0: Being Human In The Age of Artificial Intelligence, MIT professor Max Tegmark (pictured) describes a clash between Musk and Page from 2015

Elon Musk is one of the most prominent names and faces in developing technologies and incredibly outspoken when it comes to the powers of AI.

In 2014 he likened working on artificial intelligence to 'summoning the demon'.

Just last month he warned that humans could create an 'immortal dictator' from which we could never escape.

Professor Tegmark writes: 'Larry [said] that digital life is the natural and desirable next step in the cosmic evolution and that if we let digital minds be free rather than try to stop or enslave them the outcome is almost certain to be good.

'He argued that if life is ever going to spread throughout our galaxy, which he thought it should, then it would need to do so in digital form.'