I am getting some confusion on whether M-theory accepts many-worlds interpretation. Can anyone show me the reasons or rebuttals for the possibility of the many-worlds interpretation in M-theory? Thanks.
This contains no new information but since nobody else seems to jump in I thought I could transform my comment into a short answer.
Many-worlds is just an (I don't know how useful ...) interpretation of QM and is not (directly) related to M-theory or to the large number of vacua it has as solutions. These are two separate issues or concepts which are sometimes confusingly both called multiverse. So M-theory neither refutes nor accepts the many-worlds interpretation.
Just to expand slightly on an existing answer: many worlds depends entirely on how you interpret quantum mechanics, and the interpretational issues have nothing to do with M-theory. However, M-theory is a quantum theory, so you have to embrace quantum mechanics/ quantum field theory and think about the interpretational issues if you want to understand reality.