Like this pattern, where telling me there's just one idea followed by that-one-idea is weird and redundant.

The one idea in this step: a model writes by rolling weighted dice between several words that would each be fine.

The one idea in this step: the key secretly colours the shortlist and gives one colour a gentle nudge. The text still reads normally.

The one idea in this step: with the key, you can re-colour any text and simply count. Marked text lands green too often to be luck.

The one idea in this step: the mark lives in runs of untouched wording. Editing erases it exactly where the runs break, and nowhere else.

The one idea in this step: detection is private, probabilistic, and about processing, not authorship.

I suspect someone prompted the LLM with "have just one idea in each step", because apparently breaking down a process into steps is just toooo much wooooork these days.