I am looking for an English word to describe a person who is very good at sounding intelligent and thoughtful without actually being intelligent and/or thoughtful.
The person I'm imagining speaks clearly, in well formed sentences and paragraphs, has a broad vocabulary and uses it well, and might be extremely knowledgeable. S/he uses these skills to make arguments that sound dazzlingly convincing but actually make no sense.
A contrived example: I ask you why the price of widgets has risen so much over the past decade. You present convincing evidence that the widget industry has always been monopolized, and then explain clearly and convincingly --- using both theory and historical examples --- why we should expect monopolies to charge high prices. But you've completely overlooked the fact that high prices are not the same thing as rising prices --- so that in fact all of your arguments are actually irrelevant to the question at hand.
There are two different possibilities:
A. You are being intentionally deceptive, hoping I won't realize that your arguments are irrelevant to the question (like a silver-tongued lawyer)
or
B. You yourself are unaware that your arguments are irrelevant to the question (because you are not nearly as smart as you sound).
I am primarily looking for a word that describes case B, though words to describe case A are also welcome, as are words that apply in both cases.
The developers of ChatGPT warn that the bot "sometimes writes plausible-sounding but incorrect or nonsensical answers". The word I am looking for would fit very well in this sentence: "Talking to ChatGPT can be a lot like talking to a _________."