Earlier quoted context omitted.
Sometime, LLMs actually generate copyright headers as well in their output - lol - like in this PR which was the subject of a recent HN post [1] https://github.com/ocaml/ocaml/pull/14369/files#diff-062dbbe... [1] https://news.ycombinator.com/item?id=46039274
So what? I can probably produce parts of the header from memory. Doesn't mean my brain is GPLed.
It would be if they could get away with it. The likes of Disney would delete your memories of their films if they could get away with it. If you want to enjoy the film, you should have to pay them for the privilege, not recall the last time you watched it.