Why did she attend five different colleges?

According to Halcro, it didn't. Palin creamed him because "she's a master, not of facts, figures, or insightful policy recommendations, but at the fine art of the nonanswer, the glittering generality. Against such charms there is little Senator Biden, or anyone, can do." The evidence of Palin's CBS News interviews suggests otherwise, but we'll just have to see. Meanwhile, Joe Biden should find the time to study this video of one of Palin's 2006 gubernatorial debates. This is no moment for overconfidence—especially in a guy  who's been known to brag fatuously about his IQ and to embellish his own academic record.

Correction, Oct. 2, 2008: An earlier version of this column written before the clip was made public stated, incorrectly, that Palin could name no Supreme Court decision of any kind apart from Roe v. Wade. This assertion was based on a report in Politico, which in turn attributed the (inaccurate) characterization to an unnamed Palin aide. (Return  to the corrected sentence.)