A book/movie/technology etc that lived for N years, has a life expectancy of N years left. This applies doubly so for scientific books b/c if a book survived for a long time despite the advancement of science then it's a super strong signal. I think this was initially popularized by Taleb, but the [chads are really into Lindy stuff](https://www.nytimes.com/2021/06/17/style/lindy.html) these days. #published 2025-03-01