And it doesn't foreclose the possibility of LLM achieving human-like writing ability. If I stole the writing of a human author much better than me it would still be plagiarism.
Of course, with real books we do have the problem of ghostwriting, where an author willingly writes for a book that will be published under someone else's authorship. That may be where things end up here, with requirements to acknowledge sources, whether ghostwritten for you or written by others.
And it doesn't foreclose the possibility of LLM achieving human-like writing ability. If I stole the writing of a human author much better than me it would still be plagiarism.
Of course, with real books we do have the problem of ghostwriting, where an author willingly writes for a book that will be published under someone else's authorship. That may be where things end up here, with requirements to acknowledge sources, whether ghostwritten for you or written by others.