I do not mean a fair use claim. To quote the copyright office "Copyright does not protect facts, ideas, systems, or methods of operation, although it may protect the way these things are expressed" source

Facts and ideas cannot be copy written, so what I was specifically referring to is that if I or an AI read a paper about jellyfish being ocean creatures, then later talk about jellyfish being ocean creatures, there's no restrictions on that whatsoever as long as we don't reproduce the paper word by word.

Now, most of the time AI summarizes things or collects facts, and since those themselves cannot be protected by copyright it's perfectly legal. On the occasion when AI spits out copy written work then that's a gray area and liability if any will probably decided in the courts.