MWI is considered by some to be unfalsifiable and hence unscientific because the multiple parallel universes are non-communicating, in the sense that no information can be passed between them.
Advocates of MWI often cite a poll of 72 "leading cosmologists and other quantum field theorists"[REF] conducted by the American political scientist David Raub in 1995 showing 58% agreement with "Yes, I think MWI is true" [REF].