A: It's like, uh, everything. And also possibly nothing. But probably not actually nothing, because have you seen the state of our reality lately?
A: Oh, yeah. That's just a Tuesday.
A: Only if you're a time-traveling, reality-hopping, dimensional ninja. Otherwise, you're stuck in your own world, buddy.
A: It's more like, finite and also probably still infinite but with a few really annoying loops.