Robin Hanson at OSCON07.

Feedback for Robin: I wish people would not "skate over" Auman's theorem on "not agreeing to disagree" like this so much. It took me personally rather a long time to figure out that Auman was actually saying something deep and interesting - and a few slightly more comprehensive summaries would have helped me a lot.

The penny dropped for me upon reading this: "Once Robin tells me his estimate, and I tell him mine, we should converge upon a common opinion. In essence his opinion serves as a "sufficient statistic" for all of his evidence." ...which I didn't immediately understand (and indeed it's not really correct). Then I looked up Auman's paper and found everything spelled out.