Impossible question: just how far does your knowledge stretch

Just how large of an expanse through reality does your knowledge take you? I want to ask someone, "if you could go anywhere in the world, where would it go?" Then I would go to that nation. I would ask that person a random question. Then I would ask something that nobody could answer, no matter how educated you are. "why"? Then there would be answer. Next I would ask "why?" Again. They would try to answer, but I would always follow every preceding answer with the word "why?" . I don't need to know their language, because they won't know the ultimate answer anyway. I challenge a q & a no matter what credentials have you. And no one will know the answer. Nobody at all