In the profile questions, this appears: "Is there more than a 10% chance that the following are real or work?" I don't believe in any of the things on the list -- except possibly the multiverse. And I'm wondering why that was included... Perhaps there is some social context of which I'm unaware. To my mind, and being interested in science generally and cosmology in particular, I think the idea of some sort of multiverse is gaining ground. However, to clarify, I don't think there's good evidence for it yet, and even if it's true it probably has no real impact on our lives. It's just one of those things that I can't discount. The others on the list -- I can pretty much discount those.
I think the list is there to pick up theist trolls who often try to enter the site. It forces them to openly admit who they are or to give false answers.
@Omnedon No idea. Except that some, perhaps foolish, atheists will use multiverse as an answer, when pressed by theists to explain what happened before the big bang, (Assumes belief in the big bang.) where as the best answer is. "I don't know because I have no evidence, and neither do you."