Suppose there is a question asked by someone else, and you really want a good answer because that would solve your problem as well. Now, a lot of people give replies and one of the answers gets accepted. However, the answer is not that good and does not solve your problem. You try to add comments, but some people who would otherwise bother to give a correct answer will probably skip the question completely as it is marked as 'answer given and accepted'.
Now, what should you do in such case?
One idea is to ask a new, completely identical question, but now you're in control to decide when it is answered. But, would that go against SO rules?