Proof McCain Cheated?

We know he was in his motorcade and not in a quiet chamber ... but did he really know the questions at Saddleback beforehand? Or was he just well prepared to spout the GOP TP's? This post argues that McCain did know about the SCOTUS question because he asked Warren if they should "go back" to that question - when Warren had never mentioned the Supreme Court to him! Freudian slip? You judge.