Stephen Wolfram: Time Is the Universe Computing Itself
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- Stephen Wolfram, physicist and creator of widely used computing tools in physics, is developing "The Wolfram Physics Project," which reframes physics through computation rather than traditional math and thermodynamics.
- Wolfram defines time as "the irreducible doing of computation" — what we experience as time is the universe computing each successive state from the previous one.
- Computational irreducibility, a concept Wolfram has discussed since the mid-1980s, means some systems cannot be shortcut: the only way to know what comes next is to compute every step in sequence.
- Wolfram uses calculating the digits of pi as an analogy — you cannot compute the 1200th digit without first computing the preceding 1199.
- Humans are computationally bounded observers, unable to run an irreducible process to completion, which is why no amount of cleverness lets us predict or jump to the future.
- We cannot build a faster-than-universe computer to out-predict reality, because any such device would itself be made of matter inside the universe.
- Computational irreducibility reconciles determinism with the sense of free will: even if outcomes are set by prior states, no observer can know them without running the computation step by step.
Why it matters: If Wolfram is right, the irreversibility of time is not mysterious at all — it is a built-in consequence of irreducible computation. For physicists, that's a falsifiable explanation of why no mathematical shortcut can ever replace running the universe forward one step at a time, which would reshape the search for a theory of everything around computation rather than equations.
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