The main reason is the double-slit experiment: if you start with a notion of reality that expects photon to travel through either one or the other slit, and then the nature is like ~_~, it is already a sufficient reason to rethink reality. Different parts of probability distribution don’t influence each other.
What happens if we experimentally discover a deeper layer of physics beneath QM
I mean, there is no need for hypotheticals—it’s not like we started with probabilistic reality—we started with gods. And then everyone already changed their notion of reality to the probabilistic one in response to QM. Point is, changing one’s ontology may not be easy, but if you prohibit continuous change then the Spirit of the Forest welcomes you. So yes, if we discover new better physics and it doesn’t include interference between worlds, then sure, we dodged this bullet. But until then I see no reason to not assume MWI without special status for any measure. We don’t even lose any observations that way—we just now know what it meant to observer something.
The main reason is the double-slit experiment: if you start with a notion of reality that expects photon to travel through either one or the other slit, and then the nature is like ~_~, it is already a sufficient reason to rethink reality. Different parts of probability distribution don’t influence each other.
I mean, there is no need for hypotheticals—it’s not like we started with probabilistic reality—we started with gods. And then everyone already changed their notion of reality to the probabilistic one in response to QM. Point is, changing one’s ontology may not be easy, but if you prohibit continuous change then the Spirit of the Forest welcomes you. So yes, if we discover new better physics and it doesn’t include interference between worlds, then sure, we dodged this bullet. But until then I see no reason to not assume MWI without special status for any measure. We don’t even lose any observations that way—we just now know what it meant to observer something.