ISTR they've already done a rudimentary demonstration that our universe can't be simulated on hardware "the same size as" itself (it's what Rudy Rucker called "gnarly") The universe is "too big" to be simulated inside another universe that runs on the same kind of physicshttps://twitter.com/cstross/status/1332788660954075136 …
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The original version of the simulation hypothesis, as a reminder, was intensely anthropocentric It was NOT just saying the universe could be software running on hardware, ie a thing inside another thing (that's an extremely basic and ancient idea)
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It was this rah-rah shit about Moore's Law making computers ever more powerful "We can simulate so many things right now that it's easy to imagine in a hundred years our descendants will be able to simulate ANYTHING Why wouldn't they be simulating their own history"
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The point of it was to imagine that God is just a bunch of ordinary humans like us who would have the same motivations for creating the simulation as we would if we had that power There is, it turns out, no reason to think this and tons of evidence against it
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End of conversation
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Well, I mean - only if the rest of the universe is real, right? You can probably take some shortcuts if it's just a few hundred people.
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Yeah it's much easier if you imagine the universe just doesn't exist and you're a brain in a jar (or, really, I'm a brain in a jar, since I only have direct evidence for my own experience) But that's really another separate thing
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I always assumed that the realistic simulation hypothesis was that this universe was a simulation inside of a universe with like 26 spatial dimensions.
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I presume the efficient thing would be to make an actual universe (though in any case I think the important point is from our point of view it's the actual universe in any case)
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There's a probabilistic argument to be made - if one assumes that any technology that *could* simulate universes can simulate more than one per "host universe," most universes would be simulations. (But this theory is not, as they say, "actionable.")
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