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Ep 124: David Deutsch’s ”The Fabric of Reality” Chapter 6 “Universality and the limits of Computation”

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Quantum Computing Is Not a Human Mathematician

Quantum computers can perform computations of which no human mathematician will ever, even in principle, be capable. But this does not prevent us from understanding those things and what is going on there. We're still universal. People are universal explainers, not universal calculators. Indeed, i don't think there can be a universal calculator. After all, all we need to do is to just think of a number large o whose prime factorisation could never be done... maybe the universe goes on forever. Maybe if the universe is eternal, and this computer lasted forever and had an eternal antand an infinite amount of energy, maybe then you could have this universal calculator. It turns out that it

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