Wouldn’t it be fair to consider a causally disconnected (relative to us) place to be another universe, at least in layman terms? After all, it is expected in a

Wouldn’t it be fair to consider a causally disconnected (relative to us) place to be another universe, at least in layman terms? After all, it is expected in a couple trillion years that nothing outside the local group will be observable. Who knows how much “disconnected universe” there is. Unless that is somehow known, which seems difficult since it is by definition causally disconnected.