The term “Claudefishing” was invented by Chris Best, CEO and co-founder of Substack, and popularized via a July 21st post he published on the platform titled “Against Claudefishing: Building trust in the AI age.” He asked, on the record, whether AI books and human books compete in the same market and what that competition actually does to sales. An outside expert, Mohit Iyyer of U. Maryland, told The Atlantic’s Will Oremus it is “almost statistically impossible” for a fully human book to score that high. The recent books paper adds a second measure, and it is the most useful number I have read this year. Borrowed phrasing rises with revenue in AI books precisely because those books have nothing else to spend.