I've answered a couple of questions about smoking recently. In one of the other answers, there's a pretty compelling argument against my answer. I haven't changed my mind just yet, but I definitely plan to experiment as grilling season is upon us. My answer is definitely the conventional wisdom.
If I change my mind and want to revisit my answer, what's the appropriate way to do that? Delete my answer and add a new one? Edit the existing one (which may leave up votes that aren't really relevant)? Just add a new answer? What if the answer has been accepted as "right" by the OP?