“Why would you ask a stupid question like that?”
“If there are no stupid questions, then what kind of questions do stupid people ask? Do they get smart just in time to ask questions?”
“There is no such thing as a stupid question. Just stupid people who ask questions.”
“Why ask a question whose answer would demand ten more questions?”
“The only stupid question is the question that is never asked.”
“It's the stupid questions that have some of the most surprising and interesting answers. Most people never think to ask the stupid questions.”