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Authors Are Furious After Finding Their Works on List of Books Used To Train AI
(www.themarysue.com)
This is a most excellent place for technology news and articles.
Wikipedia: In copyright law, a derivative work is an expressive creation that includes major copyrightable elements of a first, previously created original work.
I think you may be off a bit on what a derivative work is. I don't see LLMs spouting out major copyrightable elements of books. They can give a summary sure, but Cliff Notes would like to have a word if you think that's copyright infringement.