This final note today about the GOP debate and what markets can tell us about ourselves. There's an active market in who's going to win the Republican nomination online at Intrade -- it's a market or an exchange in which people bet on outcomes, be it an athletic contest or a political one.

Anyway, before his brain freeze last night, Rick Perry was at 8 percent on Intrade, meaning the market thought he had an 8 percent chance of winning the nomination.

Right afterward: down to 4 percent. For forgetting what he was going to say.

Worse odds than Herman Cain had.

Check out the odds here.

Follow Kai Ryssdal at @kairyssdal