In physics, and actually really are dead peop who are still alive, but they're not alive in our universe. We no longer vibrate in unison with elbus presley in another universe. So sorry about that. But it wouldn't be literally him exactly. It would be somebody very much like elvis. In other words, this is a shortinger cat problem. Cats can be bot dead and alive simultaneously, or the universe splits. And so in one universe, you have a dead cat. Another universe,you have a live cat. The many worlds theory has been getting a lot of attention recently because of string theory. String theory necessarily allows multi verses of universes. This means