Comment by CarmendeMacedo on Rationality Quotes July 2011 · 2011-07-10T09:24:25.291Z · LW · GW

Why should evidence of bias be some evidence against a belief? This would be like magic: using someone's failure of rationality to learn something about the world, which is absurd. (Example: Federer's wife is very confident that he will win, because she is biased in his favor. Does this give me any reason to bet against Federer? Obviously not.)