The Problem Solved in Quantum Theory

David Lewis wrote on plurality of worlds, a great book, to philosophical treatise. In it he's dealing mainly with logically possible other worlds but the idea with respect to possibility and counterfactuals is the same. What I think it speaks to here is that Sam and Lex tend to be circling in terms of psychology, what is bad philosophy. They're just unwilling to take the many worlds seriously, the multiverse, quantum theory. Even though it would solve the problem parsimoniously for them here,. It solves lots of problems, all those problems in physics that otherwise would be inexplicable about quantum mechanics.