"Don’t be surprised, then, when your question “What do you mean by that?” is met with a blank stare. People don’t know what they mean much of the time. Often they’re merely repeating slogans. When you ask them to flesh out their concern, opinion, or point of view with more precision, they’re struck mute. They are forced to think, maybe for the first time, about exactly what they do mean."

— Greg Koukl, Tactics p. 51