Going through expiring predictions reminded me. Just as we did for 2010 and 2011, it's time for LessWrong to make its beliefs pay rent and give hostages to fortune in making predictions for events in 2012 and beyond.
Suggested topics include: Methods of Rationality updates (eg. "will there be any?"), economic benchmarks (price of gold has been an educational one for me this past year), medical advances (but be careful not to be too optimistic!), personal precommitments (signing up for cryonics?), being curmudgeonly about self-improvement, making daring predictions about the future of AGI, and so on.
As before, please be fairly specific. I intend to put most predictions on PredictionBook.com and it'd be nice if they weren't too hard to judge in the future.
(If you want advice on making good predictions, I've tried to write up a few useful heuristics I've learned. So far in the judging process, I've done pretty well this year, although I'm a little annoyed I got a Yemen prediction right but for the wrong reasons.)
Right; in fact, we can see pretty easily that just transferring the predictor's probability to our better more precise predictions will intrinsically increase their apparent confidence. The point of our versions is to be narrower and better defined, and so we will judge our prediction correct in fewer states of the world than they would have judged their own prediction (independent of any biases); fewer states of the world means less confidence is justified (P(A&B) <= P(A)).
Of course, in practice, due to the many biases and lack of experience afflicting them, people are usually horribly overconfident and we can see many examples of that in this thread and the past threads. So between the two, we can be pretty sure that predictors are overconfident.