komponisto comments on Open Thread: November 2009 - Less Wrong
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What exactly is it that you claim to know here? It's not a particular quantitative many-worlds theory that makes predictions, or you wouldn't be asking where the Born probabilities come from. It's not a particular qualitative model of many worlds, or else you wouldn't talk about Robin's mangled worlds in one post, and Barbour's timeless physics in another. What does it boil down to? "I know that quantum mechanics has something to do with parallel worlds"?
I think it comes down to:
(1) The wavefunction is what there is; and
(2) it doesn't collapse.
Well said, this has seemed to be what Eliezer has tried to argue for in his posts. He even went out of his way to avoid putting the "MWI" label on it a lot the time.