It tu... I mean, I suspect that it's ability to 'deceive' correlates strongly with how much you trust the author on that subject in the first place. If someone

It tu... I mean, I suspect that it's ability to 'deceive' correlates strongly with how much you trust the author on that subject in the first place. If someone tell me "turns out, the astrologers have been right all along!" ... that's not going to sway me unless they're sitting in front of a library of relevant peer reviewed evidence, and can guess which irrational number I'm thinking of.