+Eliezer Yudkowsky's fictional portrayl of the world of dath ilan (capitalization _sic_)
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+Dath ilan had originally been introduced in a [2014 April Fool's Day post](https://yudkowsky.tumblr.com/post/81447230971/my-april-fools-day-confession), in which Yudkowsky "confessed" that the explanation for his seemingly implausible genius is that he's "actually" an ordinary person from a smarter, saner alternate version of Earth where the ideas he presented to this world as his own were common knowledge. (This likely inspired the trope of a [_medianworld_](https://www.glowfic.com/replies/1619639#reply-1619639), a setting where the average person is like the author along important dimensions.)[^medianworlds]
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+[^medianworlds]: You might think that the thought experiment of imagining what someone's medianworld is like would only be interesting for people who are "weird" in our own world, thinking that our world is a medianworld for people who are normal in our world. But [in high-dimensional spaces, _most_ of the probability-mass is concentrated in a "shell" some distance around the mode](/2021/May/sexual-dimorphism-in-the-sequences-in-relation-to-my-gender-problems/#typical-point), because even though the per-unit-hypervolume probability _density_ is greatest at the mode, there's vastly _more_ hypervolume in the hyperspace around it. The upshot is that typical people are atypical along _some_ dimensions, so normies can play the medianworld game, too.
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