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Stephen Wolfram recently announced that he has a name for "the result of following all computational rules in all possible ways" (he calls it "the ruliad"), and that it describes, or is, not just all possible worlds, but all possible mathematics. There is a Tegmark-like collapse of the distinction between physics and mathematics here (and also echoes of physicist John Wheeler's older idea that "pregeometry" might be a statistical mechanics of logical propositions). Wolfram's version might deserve precise understanding and critical scrutiny by people interested in such things.