STORY: Have you ever been made to feel unsure something that you thought was obvious, but are led to doubt? I once saw a film of a classroom in which the teacher asks the children to put their had up if they think Mexico is north or south of the United States. Everyone except one kid put their hands up for north. After looking around confused, the one child puts his hand up as well. The experiment was supposed to show that peer pressure is so powerful that it will get us to give up even the most obviously true beliefs. All the children except one were told to put their hand up for north. The one child left out was so influenced by the crowd that he was prepared to accept a wildly false claim. You may think that that would never happen to you. You would stay with the true belief even if no one else joined you. But consider the following. What if the belief was something less obvious to people? What if the belief was something like the second coming of Christ? Would you be so sure? P...