Computationalism (the idea that everything in existence is fully characterized by states and transition functions) is
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Replying to @Plinz
Where this is not boringly obvious is the non-classical realm of quantum mechanics. The entire value proposition in quantum computing is that it can perform a kind of computation that transcends classical computation.
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Replying to @IntuitMachine
QM is still a computational theory, just not classical. It always comes down to a big table of numbers, then your Hamiltonian comes along, and you get a new table of numbers. (I think that the universe may be digital, but that is a much stronger hypothesis than computationalism.)
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Replying to @Plinz
When you say digital, you mean discrete? Yes, that's a stronger statement. Does states and transitions imply discrete? It seems like it does! What does computational mean? Meaning that there's a previous state in time that leads to the current state?
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Replying to @IntuitMachine @Plinz
What about backward in time theories about QM where the future influences the past? How does that fit within a classic definition of computation?
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QM is a weird and counterintuitive theory, because here, particles are functions, not states. They may be defined but don't always have a value yet, before the universe has evolved to the point where they do. Unlike CS, mathematics equates being defined with having a value.
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