I've noticed that "Not a real question" is a catch-all for closing questions.
Not a real question
It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form.
Much of the time, it seems that instead of casting a close vote, the user should just down vote the question instead. This is especially true when the question has answers! If someone can answer a question, then it's a real question. Right?
It seems to me that it might be a good idea to remove this reason for closing (and all close votes citing it as the reason) if the question has at least one answer. Or, perhaps, at least one answer with a score of at least 1, or some other such qualifier?