[linehedonist]

sounds a bit like Grammarly Authorship https://www.grammarly.com/authorship

"Authorship creates an originality report you can share with your professor, boss, or editor. It also lets you replay your document’s creation from the first word to the last punctuation mark so you can double-check your process."

[camel-cdr]

Well, this explains who has the training data to fake it then.