Hallucinations mainly occur when the prompt does not contain the information required for the completion. When you add parts of the content of the PDF to the p

Hallucinations mainly occur when the prompt does not contain the information required for the completion. When you add parts of the content of the PDF to the prompt, which is how these tools work, then it is very likely to produce a completion consistent with the PDF. I say “mainly” and “very likely”, but in my experience I have never had a hallucination when the prompt is augmented with factual data. Hallucinations occur with regularity when the prompt does not contain what is requested to be completed.