ask a silly question and you'll get a silly answer

The phrase "ask a silly question and you'll get a silly answer" means that when someone asks a question that lacks seriousness or is nonsensical, they should expect to receive a response that is equally unserious or nonsensical. It implies that the answer will not be informative or helpful because the question itself does not warrant a serious or meaningful response. It is a playful way of suggesting that the quality of the answer is directly proportional to the quality of the question.