I believe there are rules relating to copyright which allow using up to a certain number of words of text from an original text without infringing on copyright.

I believe there are rules relating to copyright which allow using up to a certain number of words of text from an original text without infringing on copyright. I think a difference with search engines there is that search engines reference the source with a link whereas the AI does not. Also, critically, search engines do not claim copyright over the text shown in their results pages. I think that forms the legal basis for why AIs should be allowed to train on public data for free but it does not form a legal basis for AI to have copyrights over the output.