I notice quite a few of the unanswerred questions actually do have an answer. But it is buried in the comments. One pattern is where the poster asks a question, has a discussion in the question comments, and then posts an "Aha..." comment with the answer. That leaves the question with no answers, or one or more answers that were not the solution and therefore can't be marked as answered. Unanswered questions are hurting our stats.
In this situation, should we encourage the questioner to answer their own question and accept it?