My core point to take away, is that novelty is a complete myth in such a universe, and the future has to be contained within the past in its entirety, or at least to the extent that it is predictable. It isn't actually new or different, as it was always perceivable, or discernible from any point in the past before its occurrence.
isn't actually new or different, as it was always perceivable, or discernible from any point in the past before its occurrence.
How would the computer computer the future of the universe without being the entire universe? And if the entire universe isn't computing ahead such that we know the future, then you can't have a computer inside the universe doing so. — Marchesk
If such prediction is impossible however, than I would say let's live in the illusion of a non-deterministic world, regardless of wether we do or not. — John Frostell
determinism implies external predictability, that is, the possibility for an external observer, not part of the universe, to predict, in principle, all future states of the universe. Yet, on the other hand, embedded predictability as the possibility for an embedded subsystem in the universe to make such predictions, does not obtain in a deterministic universe.
The visible universe is thought to contain about 10123 bits of information. A rudimentary quantum computer containing only a few hundred qubits vastly outstrips that! — tom
The visible universe is thought to contain about 10123 bits of information. A rudimentary quantum computer containing only a few hundred qubits vastly outstrips that! — tom
Do you think that a few hundred qubits could completely simulate a black hole? And by that, I mean the object itself, not just the effect on things outside the event horizon. — Marchesk
It depends on the size of the black hole. If the black hole is smaller than the visible universe, then yes. More interestingly, a universal computer inside a black hole could simulate the black hole. — tom
Surprisingly, according to the laws of physics, simulating the entire visible universe is indeed possible using a universal computer, from within the universe. — tom
I don't see how having a computer, quantum or otherwise, that can store enormous volumes of information helps in simulating the universe, if the computer is in the universe. Let the info storable by the computer be A and the info in the universe outside the computer be B. Then, as long as B is nonzero, for the computer to simulate the universe it has to store at least volume A+B which, no matter how mind-bogglingly large A is, will be more than the computer can store. — andrewk
More interestingly, a universal computer inside a black hole could simulate the black hole. — tom
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