There are a few ways to derive the Born rule within WMI. None are perfect but their assumptions are fairly reasonable and most importantly the handling of proba

There are a few ways to derive the Born rule within WMI. None are perfect but their assumptions are fairly reasonable and most importantly the handling of probability is better defined than in classical mechanics or Copenhagen, so it's not a reason to discount the theory. https://en.wikipedia.org/wiki/Many-worlds_interpretation#Probability https://en.wikipedia.org/wiki/Many-worlds_interpretation#Pro...