In our ever-more-polarized political debate, it appears that it is now wrong to ever change your mind, even if empirical evidence from the real world suggests you ought to.
I find this a strange and disturbing conclusion.
This kind of polarization affects a range of other complex issues as well: You can't be a good Republican if you think there may be something to global warming, or a good Democrat if you support school choice or private Social Security accounts. Political debate has become a spectator sport in which people root for their team and cheer when it scores points, without asking whether they chose the right side. Instead of trying to defend sharply polarized positions taken more than three years ago, it would be far better if people could actually take aboard new information and think about how their earlier commitments, honestly undertaken, actually jibe with reality — even if this does on occasion require changing your mind.
