"What's my position?"

I used to think McCain's flipping of positions and refusal to answer questions to which he, as a Senator, should surely know, was not because he's stupid or senile, but was just a careful politician wanting to balance the bloodlust of his conservative base and his need to woo independents.

Nope, he's stupid or senile.

Am I impugning his character? Not at all. He's just stupid or senile.