The claim: Somewhere, outside of this universe we know, there is a stone that prevents gods from existing. I have said it, and I propose it is true. The stone speaks to me, and says "I prevent gods from existing in the past, present, and future." This revelation was delivered to me personally, because I am important. This is my proof that there are no gods. If you disagree, you must prove that this stone can not exist. The problem: If you are right, presenting a proof will immediately invalidate your claim. If this stone does not exist, then you can find no proof or it positive or negative and if it does exist, then you must realize that there is no point in proving it doesn't exist. In order to know that this stone hasn't existed and will never exist, you must live past the end of the universe. This stone cancels all existence of gods, and if you will prove it never existed then you must be able to view all of history like a god yourself... which is impossible, because the god-preventing stone exists... I just said so. If you claim that your god is real, then I require you to prove that this stone does not exist. * Please understand: I am proposing a thought experiment, not any kind of dogma.