Theodore Dalrymple

Many young people now end a discussion with the supposedly definitive and unanswerable statement that such is their opinion, and their opinion is just as valid as anyone else's. The fact is that our opinion on an infinitely large number of questions is not worth having, because everyone is infinitely ignorant.

To ask questions can become the laziest and wobbliest occupation of a mind, but when you must yourself answer the problem that you have posed, you will meditate your question with care and frame it with precision.