Comment by twotwotwo

The Jacobian one is great, and fits here -- 1) the counterexample came out as a tweet of a single expression which seems exceptionally hard to turn into something sensible, which crystallizes the lab's approach; 2) it links (like the Sendov post) to a chat transcript showing a little of what was involved in untangling it (though of course all that went into asking the right questions is invisible!).

For other folks, the post: https://terrytao.wordpress.com/2026/07/21/a-digestion-of-the...

The transcript: https://chatgpt.com/share/6a5fdc7a-d6f8-83e8-bbea-8deb42cfed...