He may or may not be stupid, but he is definitely lazy. He just has no motivation to learn. Actually using his brain is just too much effort. All he wants to do is party on, dude.
He may be lazy but four years ago he was able to get through these debates as well as the Democratic debates.
About a week ago, Obama himself came out and said that Romney was a very good debater and that he was only fair, thus lowering the bar for his own performance and raising the expectation that Romney should do very well!
He just didn’t understand that Romney meant business going into this debate.