Is that really true or are a lot of these books out of copyright? And if they're not out of copyright why can they train on them without permission? They prob

Is that really true or are a lot of these books out of copyright? And if they're not out of copyright why can they train on them without permission? They probably argue that training is fair use, but if I take a film and compress it with a novel data compression codec and distribute it I'm violating copyright. LLMs are lossy compression for textual information.