You're not wrong. I can imagine him asking on an automotive newsgroup for advice about a misfiring engine.
"What kind of engine is it?"
"An internal combustion one."
"No, I mean is it petrol or diesel? Four-stroke or two-stroke."
"You don't need to know that, so I'm not going to tell you. My engine is misfiring and I want to know how to stop it from doing that."
"You need to tell us some specifics so we can give you relevant advice."
"Hey, *I* decide what I tell people - that's *MY* right. You don't need to know any more than that it's an internal combustion engine and it misfires!! I personally think that if I can get 150 octane fuel, that'll solve my problem. Why is it that you instantly jump on me for exercising *MY* right to only tell you what you need to know?"
"OK. Then what kind of fuel does it use now?"
"It uses liquid hydrocarbons. You don't need to know more than that. Oh and by the way Mr Smarty Mechanic, you didn't know that to remove a spark plug, you have to turn it ANTI-CLOCKWISE!! I knew that, but you didn't!! Now who's the knowledgeable one in this discussion? Nar nar nar!!!"
Etc...