I disagree with almost all the replies here. Answering the followup question may be helpful, but it is not providing anything in the way the request. In my op

I disagree with almost all the replies here. Answering the followup question may be helpful, but it is not providing anything in the way the request. In my opinion it is more polite and less ego centric to simply answer the question first, and then, if you are still inclined to prejudge the query as something reflecting the ignorance, mention you are suspicious of its intent.