OK, let's say you were given a source for an LLM output such as "Common Crawl/reddit/1000000 books collection". Would this be usefull? Probably not. Or do you want the chat system to operate magnitudes slower so it can search the peta bytes of sources and warn of similarities constantly for every sentence? That's obviously a huge waste of resources, it should probably be done by the users appropriately for their use case, such as these NY Times journalists which were easily able to find such similarities themselves for their use case of "specifically crafted prompts to output NY Times text".