John Edwards: My greatest weakness is that I care too much, Tim. For 54 years, I’ve been fighting. I emerged from the womb with my dukes up, ready to do battle with every fiber of my day-old being.

Hillary Clinton: My greatest weakness is that I get impatient — impatient with people who don’t care as much about children as I do.

Barack Obama: My greatest weakness? Sometimes I misplace stuff. I’m a little disorganized. It’s probably a good thing I’m not in charge of my own schedule.

Conventional wisdom is going to be that Obama lost this exchange, even though he’s the only one who offered an answer that wasn’t transparently b.s.