I see a lot of people claim the training model included copyrighted works particularly books because it can provide a summary of it. But it can provide a summary of visual media too, and no one is claiming it’s sitting there watching films.

If the argument is it has quite a detailed knowledge of the book, that’s not convincing either. All it needs is a summary and it can make up the blanks, and get it close enough we can’t tell the difference. Nothing is original.