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I have seen many good questions are closed for reasons such as not-a-good-question. Questions for which we do not have concrete answer, may be because we don't have the right answer, have right to live. May be we will get answer for them in future, when sufficient minds have probed the questions. Many of my questions are victims, btw. The point I am trying to make is, closing of questions, IMHO, is little overzealous on SO.
Someone please tell me reasoning beyond the official terse on verge of curt lines of explanation?