There is also another scenario which sometimes occurs. A person posts a Discussion which received several responses, but was not answered. It was however marked as Assumed Answered. In some cases, it is marked Assumed Answered even without any responders. So if there is a response, you can mark it Correct Answer and then unmark it which resets the Discussion Status to Not Answered. If there are no responses, I add a response, mark it correct, unmark it as correct, then delete the response (which is probably how it should be done even with responses). That also resets the status to Not Answered.
Regards, Mike (Moderator)
SAP Technology RIG