Logic ... and proof. If any of it was true then according to the myths our world would have ended a LONG time ago, since it fits almost any time period. So far, each time they have made the idiotic claim that the world is entering the apocalypse it has come true exactly ... zero times. Yep ... still no end of the world, and each person they called the anti-christ has proven to have flaws, but none have been truly evil. So ... until the apocalypse actually happens it's all myth. But tell you what, when it does happen for real I'll send you a million bucks, promise.