In this case, the word "universe" means everything there is. If there's some kind of comic book like "multiverse", it's really just one "universe" with differen

In this case, the word "universe" means everything there is. If there's some kind of comic book like "multiverse", it's really just one "universe" with different pockets. It's not actually multiple "universes." I guess we can't rule out that someone is using Earth as a computer, but if they were, you'd expect the mice to get better cheese.