Questions do not always imply a lack of knowledge about the subject matter. When assured of anonymity, human mind tends to play several Games. One of them is to do kite flying about one's pet theory or belief and see which way the wind of general opinion blows.Also, in circumstances where a personal experience is too much controversial to be owned in public, the device of hypothetical question is used as a cover, to elicit others'opinions on the matter. It helps to down play guilt feelings or even the trauma of new found knowledge.