>>12253862If you're asking about evidence of those other universes, nope.
However, it's the only interpretation that explains the interaction between quantum and classical systems well, and combines the phenomenon of observation with that of entanglement. Also, most other interpretations lead to much weirder consequence: Copenhagen breaks causality, spontaneous collapse breaks conservation of energy, etc.
>>12253889I think his argument is that the unversal wavefunction has a lower komolgorov complexity than the universe in other interpretations. In that case, the multiverse is much less complicated than its components, including the universe we experience. This actually isn't such a bad idea; there are many instances of an ensemble being simpler than its components. In that way, MWI is the least complicated. Also, it has fewer postulates than other interpretations, since it doesn't include wavefunction collapse. In that way, it's a very simple interpretation, and using occam's razor isn't such a bad argument.
