Well for one thing, you don't just get one shot, this is a discussion. If you ask as best you know how and someone answers a different question than the one you want answered, you continue the discussion by saying, no that's not what I meant, what I meant is more like ... and if the answer to that one isn't right, you ask a third time. And perhaps from that process of asking not-quite-the-right-question you learn how people are likely to interpret what you are asking so that the next time you ask something, you take how they are likely to interpret it into account and skip a few of the steps.

Either you know what you want to ask, in which case, you just ask it and it's no longer within your control how people answer it, or else you don't know what you want to ask, in which case you make as good an attempt as possible and you take the replies (even the wrong ones) as stepping stones to the right question.

update:I wrote the above on general priciples, then I went and looked at one of your recent questions (464621) and it turns out to be a perfect example of what I meant. Instead of clarifying what you meant or telling us how the supplied answers were insufficient or off-base, you simply gave up. I recommend that you look back over that question and the responses to it and continue the discussion, tell us why the answers didn't suit you so we can begin to guess what your question was really about. It doesn't really matter whether the miscommunication was on your part in how you asked the question or in the answerers part in how they (mis)interpreted your question. The point is, there was miscommunication and the only way to solve that is to communicate further.