According to a recent story in GQ, Katy Perry (American pop star extraordinaire) believes in aliens. It would appear that her song “ET” for “extraterrestrial” speaks to a genuine article belief in foreign life forms. In our culture, belief in intelligent alien life is often treated like belief in religion–you either have it or you do not, and in either case there isn’t much evidence one can muster for either side. But I’d like to have a little fun and ponder this question. What is the most reasonable position for a person to have on the existence of aliens giving existent non-conspiratorial evidence?