“I don't have to answer. Until you know the question.”
“Do not ask questions until you have trained yourself not to know the answers.”
“You never know the answers to the questions of life until you are asked.”
“I refuse to answer that question on the grounds that I don't know the answer”
“I don't know the question, but sex is definitely the answer.”
“Are you going to answer my questions, or do I have to whack you with a stick until delicious candy surprises fall out?”