Not OP but it sounds like the basis of a tool to validate where the source material comes from, as well as to reveal how much has been elaborated upon in other versions.

Also, elaborating from / interpreting OP, to explore the parts of a given article which have absolute merit, and discovering patterns in effective language.

Obviously this won't be necessary knowledge for the sake of writing, though nonetheless interesting for linguists. But with the machines busying themselves with that, a good analysis and production could have a profound effect on spoken language. As in, you are what you read, and, unless you're still reading the classics, for a decent majority(?) that will necessitate an evolution in language. Not to mention the potential misuse by politicians and public speakers who will have a new level of delicate and gripping rhetoric.