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Quantumental comments on Cult impressions of Less Wrong/Singularity Institute - Less Wrong
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BTW, it's important to note that by some polls an actual majority of theoretical physicists now believe in MWI, and this was true well before I wrote anything. My only contributions are in explaining the state of the issue to nonphysicists (I am a good explainer), formalizing the gross probability-theoretic errors of some critiques of MWI (I am a domain expert at that part), and stripping off a lot of soft understatement that many physicists have to do for fear of offending sillier colleagues (i.e., they know how incredibly stupid the Copenhagen interpretation appears nowadays, but will incur professional costs from saying it out loud with corresponding force, because there are many senior physicists who grew up believing it).
The idea that Eliezer Yudkowsky made up the MWI as his personal crackpot interpretation isn't just a straw version of LW, it's disrespectful to Everett, DeWitt, and the other inventors of MWI. It does seem to be a common straw version of LW for all that, presumably because it's spontaneously reinvented any time somebody hears that MWI is popular on LW and they have no idea that MWI is also believed by a plurality and possibly a majority of theoretical physicists and that the Quantum Physics Sequence is just trying to explain why to nonphysicists / formalize the arguments in probability-theoretic terms to show their nonambiguity.
I just can't ignore this. If you take a minute to actually look at the talk section of that wikipedia page you will see those polls being thorn to pieces.
David Deutsch himself has stated that less than 10% of the people doing quantum fundamentals believe in MWI and then within that minority there are a lot of diverging views. So this is still not by any means a "majority interpretation".
As Mitchell_Porter has pointed out Gell-Mann certainly do not believe in MWI. Nor do Steven Weinberg, he denounced his 'faith' in it in a paper last year. Feynman certainly did never talk about it, which to me is more than enough indication that he did not endorse it. Hawking is a bit harder, he is on record seemingly being pro and con it, so I guess he is a fence sitter.
But more importantly is the fact that none of the proponents agree on what MWI they support. (This includes you Eliezer)
Zurek is another fence sitter, partly pro-some-sort-of-MWI, partly pro-It-from-Bit. Also his way of getting the Born Rule in MWI is quite a bit different. From what I understand, only the worlds that are "persistent" are actualized. This reminds me of Robin Hanson's mangled worlds where only some worlds are real and the rest gets "cancelled" out somehow. Yet they are completley different ways of looking at MWI. Then you got David Deutsch's fungible worlds which is slightly different from David Wallace's worlds. Tegmark got his own views etc.
There seems to be no single MWI and there has been no answer to the Born Rule.
So I want to know why you keep on talking about it as it is a slam dunk?
Good question.