Poignant short story about truth-seeking that I just found. Quote:
"No," interjected an internal voice. "You need to prove that your dad will appear by a direct argument from the length of your nails, one that does not invoke your subsisting in a dream state as an intermediate step."
"Nonsense," retorted another voice. "That we find ourselves in a dream state was never assumed; rather, it follows so straightforwardly from the long-nail counterfactual that the derivation could be done, I think, even in an extremely weak system of inference."
The full thing reads like a flash tour of OB/LW, except it was written in 2001.
I'd like to remind everyone that at one point this strategy was the de facto foreign policy of the United States.
Obligatory link to our Schelling thread.