Note from SpaceTiger: This discussion originated in the "what existed before the big bang?" thread. Well put marcus. I think we are on the same page [albeit you are more eloquent] - and I tend toward being brutally blunt. We reside in an OBSERVABLE universe. And, by definition, it includes all things that are observationally accessible to us. The only apparent limit on this 'observable' universe, is time. It is, IMO, an exercise in futility [aka, unscientific] to fret about what [if any] unobservable regions might exist. I also reject the notion hitherto unobservable regions of the universe will eventually 'cross the line' and join the ranks of the observable. Wasn't that the whole point of introducing inflation?