“Searching Google Books for the term ‘As of my last knowledge update,’ which is associated with ChatGPT-generated answers, returns dozens of books that include that phrase.”
The same search trick has already turned up AI junk in Amazon reviews, academic journals and online articles. Now it works on Google Books, and the junk could skew the Ngram viewer researchers use to track how language changes. Google says it will keep evaluating its approach. Meanwhile its catalog of the written word is filling up with ChatGPT boilerplate.