Back during the Vietnam War, the Pentagon's PR guy, Arthur Sylvester, told a group of reporters: "Look, if you think any American official is going to tell you the truth, then you're stupid. Did you hear that? Stupid." Sylvester was being too harsh, writes A. Barton Hinkle. Americans are pretty sharp when it comes to picking up on lies told by the other side. If they believe the lies told by their own side, Hinkle adds, it's not because they're imbeciles. It's because they want to.