https://fieldnotesbrand.com/apparel/remember-it-now-tee

Field Notes, a manufacturer of notebooks, uses the credo "I'm not writing it down to remember it later, I'm writing it down to remember it now." This is an fun restatement of the idea behind the power of the Feynman technique.

Link to Ahrens' version of this idea.

Sönke Ahrens outlines this broad idea of how one practices the Feynman technique for understanding using one's notes in How to Take Smart Notes, but he doesn't use the name Feynman technique. Certainly the idea of writing things down to test one's understanding predated Feynman, does anyone know of historical examples of this pattern/technique prior to Feynman? Does it have other names in the literature?