How do you know when Bush is lying?
That's easy—when he moves his lips!
Well, not quite. For instance, I doubt he's lying when he calls to Barney the dog...or orders his lunch. But maybe he can't help himself.
"Yes, I'd like the pulled pork. Thanks" Bush says, all the while thinking, "Heh, heh. I really want the burger, but I'm not telling her." [Smirk.]
Anyway, as WaPo's Dana Milbank points out, you can tell when Bush is full of shit (or even more accurately, when he's shitting his pants) by looking at his eyes.
[h/t Mark Kleiman]