Most liberals will say bush lied, but have no proof to back their statement.
"Keep in mind that our failure to find Osama bin Laden to date is not evidence of the fact that he is a figment of our imagination."
Tried this one out before on my father in law. After provoking him enough to say there were no WMD in Iraq I threw this one at him. He looked like a fembot from Austin Powers.
Kaboom!!!!