Now that’s a good teacher.
I could see the students doubting their memory because they don’t remember if they read the information from the ChatGPT essay (which might even be correct) or their text book.
ChatGPT tends to just hallucinate facts which would make zero to the people (95%+) who are writing text books.
Alternatively it can just parrot random (pop history myths and stuff) it found on the internet. But it does so in a confident and pseudo-academic fashion making it even hard to discern facts from fiction.