On 6/22/2012 11:42 AM, Stephen P. King wrote:
It is a known fact that the brain is a "connection" machine. We do not fully understand how it works and many people are only assuming (based on a cartoon of a proof by Tegmark) that it is just a classical machine.

"Connection machines" don't implement any different computations than Turing machines. Tegmark's paper just showed that the neural transmissions of the brain are almost always classical. You would reach the same conclusion if you just considered the evolutionary function of the brain. A brain that used more than a small amount of quantum randomness would not be conducive to survival.


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