This is not AI

The headings style wasn't an immediate giveaway to you? The rules of three in every. short. staccato. paragraph? The X, not Y?

The author's writing is wildly different pre-AI.

For me it was "There’s a clean exception to all of this, and it flips the entire logic." and "here’s the reframe". That's Claude-speak.

You could say it flipped their entire logic. Not that it would make sense. But I groaned reading it.