Lumifer comments on Open thread, Feb. 23 - Mar. 1, 2015 - Less Wrong Discussion
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Ideal Turing machines, being, y'know, ideal, do not exist in reality.
It's a model. Models have it's use. It makes sense to model a computer as an ideal Turing machine. It doesn't make much sense to model a human that way.
Nobody suggested modeling humans as Turing machines. The question was whether humans are Turing complete and you implied that they are not because they make errors. By the same standard, no physical device is Turing complete.