[wat10000]

If it's remixed then it would be a derivative work and you'd need permission from the original copyright holder, just like if you literally remixed a song, or made a movie based on a novel.

IMO the only reason there's even a question about whether LLMs can legally be trained on copyrighted works without permission is that the training is being done by (agents working on behalf of) rich people. If you or I scraped up every copyrighted work we could get our hands on without ever asking permission, trained an LLM on it, and then tried to sell access to the result? Just ask Aaron Swartz how that sort of thing goes, and his actions were orders of magnitude less.

Humans don't forget copyrighted material but we also don't normally memorize it. It takes substantial time and effort to be able to reproduce copyrighted material with just your brain.