There's pretty compelling evidence that Duchamp claimed the credit for La Fontaine from one of his contemporaries (Elsa von Freytag-Loringhoven) fwiw, a lot of the Art World(tm) gets very mad when you bring it up. I have really mixed feelings about Dada as a whole, I think its central thesis about "the world doesn't make sense, why should art make sense" really resonates in the present day — zoomer humor has big Dadaist vibes.

Part of the problem is that what constitutes Art(tm) is by-and-large decided by the elite