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Eugine_Nier comments on How accurate is the quantum physics sequence? - Less Wrong
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An extremely intelligent friend of mine who is studying physics as an undergraduate read the quantum physics sequence for me. He said that it's an alright explanation of the physics, in an extremely qualitative way. He said that he would personally prefer to learn QM properly via a textbook with more math.
He says that the argument given for many-worlds is valid iff you're a scientific realist, which not all scientists are.
Even then it's not obvious that it's the best explanation. Also depends on what you mean by 'realist'.
Apparently Solvent's friend thinks otherwise. My own physics-grad-student friend said MWI looks like the best explanation, though he stressed our ignorance more.
Well, another approach is to decide that probability distributions are merely a classical approximation to density matrices.