Earlier quoted context omitted.
I recently received a 2 page written report of an MRI. I couldn’t understand a single word of it. While waiting a few weeks for my appointment at the next specialist I used ChatGPT to explain it and I found it to be very helpful in understanding what was going on. I felt it did a better job in explaining in lay terms than the specialist doctors did (radiologists, orthopedic surgeons, rheumatologists).
How do you know ChatGPT explained it to you correctly? How do you know it didn't give you a wrong explanation that sounds plausible to a lay person?
In general, GPT will not hallucinate or give bad responses on the latter since it's working from a specific corpus of information (whether from RAG or from some context directly provided by the user). This is, of course, not foolproof since some of it is dependent on a good prompt and some of it is dependent on the question (GPT is well known to be poor at math, for example). But for summarization, it is exceedingly good.
The former is where it can tend to hallucinate and generate bad responses.