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OpenAI now tries to hide that ChatGPT was trained on copyrighted books, including J.K. Rowling's Harry Potter series
(www.businessinsider.com)
This is a most excellent place for technology news and articles.
Legally the output of the training could be considered a derived work. We treat brains differently here, that's all.
I think the current intellectual property system makes no sense and AI is revealing that fact.