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paulfchristiano comments on Anthropics in a Tegmark Multiverse - Less Wrong Discussion
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Shortest explanation for my thoughts. Precisely a simplicity prior on my brain. There is nothing about universe complexity.
I believe that the shortest explanation for my thoughts is the one that says "Here is the universe. Within the universe, here is this dude." This is a valid explanation for my brain, and it gets longer if I have to modify it to make my brain "simpler" in the sense you are using, not shorter.
No, it doesn't. Picking between microstates isn't a "modification" of the universe, it's simply talking about the observed probability of something that already happens all the time.
Although now that I think about it, this argument should apply to more traditional anthropics as well, if a simplicity prior is used. And since I've done this experiment a few times now, I can say with high confidence that a strong simplicity prior is incorrect when flipping coins (especially when anthropically flipping coins [which means I did it myself]), and a maximum entropy prior is very close to correct.