That does not say they do not grant copyrights to such things, and they explicitly list mixtures of things they did grant copyrights to. The only place they did

That does not say they do not grant copyrights to such things, and they explicitly list mixtures of things they did grant copyrights to. The only place they did not grant copyright was the example with no human inputs. In the case I claimed, with human creative input to direct a tool, to quote: "In the case of works containing AI-generated material, the Office will consider whether the AI contributions are the result of “mechanical reproduction” or instead of an author’s “own original mental conception, to which [the author] gave visible form.” The answer will depend on the circumstances, particularly how the AI tool operates and how it was used to create the final work. This is necessarily a case-by-case inquiry." As I put it, prompt engineering, which is often iterative, directed by a human desiring a goal, will easily surpass the statement. The simple "all AI generated content is not copyrightable" simply isn't true as the OP claimed.