Sutton Revives the Bitter Lesson Meme as Harness Engineering Faces the Same Fate

RichardSSutton · x · 2026-10-13

Richard Sutton shared a Simpsons meme reading "Days without Bitter Lesson: 0," arguing the pattern keeps repeating: expert systems, feature engineering, prompt engineering, Tesla FSD, and most recently harness engineering. Quoted in the thread, Elon Musk notes Tesla FSD followed the same path — the model ate more and more of the C++ code until nothing was left. A fresh round of the enduring hand-engineering vs. learning debate, now aimed at agent harnesses.

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