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Heuristics That Almost Always Work

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The Doctor

She is a primary care doctor. Every day, patients come to her and says “My back hurts” or “My stomach feels weird”. She inspects, palpates, percusses and auscultates various body parts, does some tests, and says “It’s nothing, take two aspirin and call me in a week if it doesn’t improve”. It always improves; no one ever calls her.

Eventually, she gets sloppy. She inspects but does not palpate. She does not do the tests. She just says “It’s nothing, it’ll get better on its own”. And she is always right.

She will do this for her entire career. If she is very lucky, nothing bad will happen. More likely, two or three of her patients will have cancer or something else terrible, and she will miss it. But those people will die, and everyone else will remember that she was such a nice doctor, such a caring doctor. Always so reassuring, never poked and prodded them with needles like everyone else.

Her heuristic is right 99.9% of the time, but she provides literally no value. There is no point to her existence. She could be profitably replaced with a rock saying “IT’S NOTHING, TAKE TWO ASPIRIN AND WAIT FOR IT TO GO AWAY”.

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https://astralcodexten.substack.com/p/heuristics-that-almost...



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