I decided to ask it: Can you give me the first 4 paragraphs of chapter 3 of the book The picture of Dorian Grey?
And it gave me something and it looked alright to me. It read right and i went to gutenberg and glanced over it and the first lines of each paragraph seemed correct but only the short ones were. The first paragraph which was longer after the opening lines suddenly had an entire section randomly replaced with hallucination.
A followup asking it to not hallucinate had it search the web to fetch the correct thing which isn't valid in this context.
I suspect it starts hallucinating once the bit of text gets long so i asked for specific sentences of chapters (and to do so without web search). the 1st, 2nd, 3rd and such.
It managed to not outright hallucinate lines then but did get the chapter i asked for wrong sometimes. I presume that with sufficiently careful prompting one can get the book out properly in sequential order with a lot of prompts but it takes quite some effort to get there. But that's where my curiosity ends for the night. My bed calls.