>> Support engineer ran customer query through Claude (trained on our public and internal docs) and it very, very confidently made a bunch of stuff up in the response.
> Yeah, LLMs are not really good about things that can't be done.
From the GP's description, this situation was not a case of "things that can't be done", but instead was the result of a statistically generated document having what should be the expected result:
It was quite plausible sounding and it would have been
great if it worked that way, but it didn't.