JoshuaZ comments on Harry Potter and the Methods of Rationality discussion thread, part 4 - Less Wrong
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Just because they are evolved, doesn't mean they are optimal. An evolved adaptation can be just as "dirty" as a fast cognitive heuristic; the architectural constraints of learning through genes can be just as constraining as those of coming up with something to do fast.
Yes, and let me add to that, just because something was adaptive when humans evolved doesn't mean it is at all adaptive now. To use a concrete example, the weight humans put on anecdotes is likely connected to the fact that in our ancestral environment, that was the primary source of data about what the risks around us were. However, now this leads to silly things like people being terribly scared of shark attacks precisely due to the rarity of such attacks making them get a lot of news coverage.