It can't be proved that he is wrong about the next fire alarm. But then every claim that the world is about to end, especially after the bible came out, and people misread Revelations, has been wromg since the fourth century. All of the claims, ALL of them, have been false. I'd put my trust in Jesus of Nazareth who reminds us that no man can or will know when the Father ends it all, and not even the angels in heaven know. By the way, don't worry about the Mayan calendar stuff either. What I worry about is the "evangelicals" who are not only ready for the world to end, but would make it happen if it were in their power. Can you say "atomic?"