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We Asked A.I. to Create the Joker. It Generated a Copyrighted Image.
(www.nytimes.com)
This is a most excellent place for technology news and articles.
The answer to that question is extensively documented by thousands of research papers - it's not up for debate.
If someone wants to read one of those papers, I can recommend Extracting Training Data from Diffusion Models. It shouldn't be too hard for someone with little experience in the field to be able to follow along.