I'd agree with Zambezi's concise summary. The Large Language Models (ChatGPT, Grok etc) function by essentially predicting the next word. If you ask it, "Write me 1000 words on reintroducing lynx to Scotland" it will trawl the net, looking for all the information and then write 1000 words based on the probability of one word following another. (I'll stand corrected on this, as the precise way they work isn't known). This means they write very descriptive text, usually grammatically accurate. But, they cannot analyse and have no idea about strength of evidence. They "know" that a scientific articles has references, so they make them up. Originally (2 years ago) these were very made up, the algorithm have improved.
This means if you asked "I am lonely and my life is ****" it will serve up platitudes based on thousand of forum chat, within that there will be stuff you agree with (a bit like horoscopes or Briggs-Myers)
They are also hallucinating (see 2001 A Space Odyssey - on tonight) and will never say, "I don't know"