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jacob_cannell comments on The Brain as a Universal Learning Machine - Less Wrong
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This is literally false. A model of a brain might, some functional copy of brain implemented on a different hardware platform possibly could. An actual human brain, I don't think so.
This is also literally false. Consider a trivial loop for (i=0; i<100000; i++) { .. } Human brains can conceptualize it, but they do not run it
Theoretically a brain with some additional memory tools could run windows. In practice, sure an actual human brain would not be able to, obviously - boredom.
I did not mean that every codepath is run - but that's never true anyway. And yes "all of the code" is far too strong - most of it is just loosely conceptually simulated by the brain alone, and then more direct sample paths are run with the help of a debugger.
Fermi estimate time! :-)
Given an appropriately unrolled set of appropriate instructions, how long would it take for a human armed with nothing but paper and pencil to simulate a complete Windows (say, Windows 7) boot process?