The other night, I came across the writer Naomi Wolf participating in a TV panel discussion about the Patriot Act. When one of her fellow guests, David Horowitz, turned in his chair to look at her, Wolf angrily broke off from the point she was making, to upbraid him. "Don't try to shut me up!" she shouted. Horowitz looked at her, mystified. "What did I do?" he asked. "It's all in your body language!" Wolf said, indicating the movement he had just made in his chair. "But Naomi," Horowitz replied in some confusion, "you told me during the last commercial...