> If you train an LLM that only you use, from books you own, I don't see how that is actually illegal. But it won't be functional, because Large Language Model

> If you train an LLM that only you use, from books you own, I don't see how that is actually illegal. But it won't be functional, because Large Language Models requires far more samples than your private library, at least if you want it to do things that you couldn't solve with a much simpler deterministic search. For example, usefully extending the document "Which book had the sarcastic one-armed antagonist?" with another sentence that happens to also be the answer.