And comparing these two results for the same question serves to illustrate how ChatGPT does not in any meaningful sense _understand_ what it is "talking" about. It basically just strings together relevant-seeming words in a plausible way. The result may be useful, or it may be nonsense.

You'd better know enough (and be alert enough) to tell the difference...

And because of how it responds to them, people often forget that ChatGPT is just a language model, not an all-knowing AI.