DON’T RESPOND TO IDIOTS.
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Arguing with idiots has the game-theoretic structure of a dollar-auction. Whoever gets in the last argument wins. Add to this the asymmetry that someone with low epistemic standarts can make up some nonsense argument in five minutes, while it takes you an hour to prove that it is nonsense. At which point the other guy will make up some new nonsense.
edit: If you decide to reply, please read the original comment on SSC for context.
Not all idiots are like that, and otherwise-non-idiotic people can also get caught in dollar-auction-like discussions if they're sufficiently mind-killed (I mean, I've seen it happen on a website where supposedly 75% of people have IQs over 130), but that's a good heuristic.
Another month, another rationality quotes thread. The rules are: