We don’t know how to derive the Born Rule in MWI, or even if it is possible to derive it. However, uncertainty goes both ways, and that’s definitely no way to dismiss QI. Is there any actual reason to suspect that MWI is true, but QI isn’t (apart from, maybe, mangled worlds)?
Because I lack the necessary mathematical understanding, I’ve never really understood what mangled worlds actually says. What does it mean when you say that a world’s probability is “too small”, and does mangled worlds say that these worlds never actually come into existence, or just that they eventually disappear?
We don’t know how to derive the Born Rule in MWI, or even if it is possible to derive it. However, uncertainty goes both ways, and that’s definitely no way to dismiss QI. Is there any actual reason to suspect that MWI is true, but QI isn’t (apart from, maybe, mangled worlds)?
Because I lack the necessary mathematical understanding, I’ve never really understood what mangled worlds actually says. What does it mean when you say that a world’s probability is “too small”, and does mangled worlds say that these worlds never actually come into existence, or just that they eventually disappear?
Also, is there something wrong with Sean Carroll’s attempt?
It works only in a very limited setting. Here’s my analysis.