Comment by colechristensen
4 days ago
Eh, the thing about the statement there is you're redefining "universe", which is fine, but restating a definition isn't really saying anything new. The literal meaning of "universe" especially with respect to the Latin origins is... well... everything. It may make sense for physics to separate in to separate sets of everything if there's some reasonable justification.
There's the Universe (everything everywhere everywhen), and then there's the observable universe. Most testable theories will be referring to the observable universe.