Let's Agree To Agree

An old friend, Cass Sunstein, has temporarily taken over the Lessig Blog. If you have any comment on the following discussion, I suggest you go there and let him hear it.

For years he's been researching how people make decisions. His belief, which he thinks is backed up by solid evidence, is when you deliberate with like-minded people, your opinions will become even more polarized--if the group is conservative, it'll become more conservative, if liberal, more liberal. On the other hand, if you hear more diverse opinion, you're more likely to temper your beliefs.

This sounds reasonable, at least. The question then becomes, if it's true, what's to be done? Does this mean we should have "balance" in a jury or on a panel of judges? I don't know. Maybe. Or maybe it just moves the argument--about what's right--one level up.