Or he is doubtful or plain lying about what he is saying.
It's actually sad to watch GWB make a speech - while reading his speech from a paper, he still has trouble pronouncing words and keeping his place on the page. He's either not engaged in what he's saying, or he actually IS as dumb as a brick. I think it's both.
It is error only, and not truth, that shrinks from inquiry.
– Thomas Paine