>
> —Thomas Jefferson, earthling
-Eliezer Yudkowsky's fictional portrayl of the world of dath ilan (capitalization _sic_)
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+Eliezer Yudkowsky's portrayal of the fictional world of dath ilan (capitalization _sic_) purports to be a
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]