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Is There a Multiverse?
If we have a theory which applies at the extreme conditions where inflation occurs, that will tell us whether Linde's assumptions are correct. And if we had a string theory that was validated by observations, then the idea of the multiverse would then be in the same epistemological state as talking about the inside of a black hole now. Although it is now speculative because we don't have any firm physical understanding of this tiny, tiny factor of a second where all the action was, we may well have that. So I think we've got to be able to mind it about it.