Contemplating infinity too early in the morning
I've decided I don't believe in multiple universes. I'm not taking issue with whatever math Everett put together. I haven't studied it at all. All the QM equations seem to be working fine. But I staunchly disagree with the idea that every possible electon combo is actualized in a multiverse. Sci-fi writers did the general population of geeks a disservice here. Can I picture alternate worlds? Sure. But they're all legal worlds, following a timeline derived from reductionist principles. But you don't need MWI to think there are other earths out there in the universe playing alternate histories. When you introduce infinite multiple worlds, though, you step past that. All of a sudden, things don't need to be reductionist to classical physics, just QM. So there would be worlds where suddenly all the English speakers switched to speaking French, and vice versa for the French speakers. Or everyone woke up one day and fully adopted someone else's identity spontaneously. These all seem "weird", but in a infinite multiverse, weird is the new normal. Our normal would be such a special case, that it would be improbably small to occur, if such universe-branching were to occur. So, I reject that there are these countless multiverses multiplying instantaneously. Apparently most self-respecting physicists agree with me, or that's the impression I get from Victor Stenger, Roger Penrose, and others.