<p>I came across this question and answer today: <a href="https://stats.stackexchange.com/questions/38141/recall-and-auc-of-a-binary-classifier">Recall and AUC of a binary classifier</a></p>

<p>And I think the accepted answer is wrong. So I wrote what I believe is a better answer, and downvoted the accepted answer explaining why I think it is wrong. </p>

<p><em>side note: if my reasoning went astray please correct me</em></p>

<p><em>side note 2: I actually think in terms of content it will be easy to fix the accepted answer and I also left a comment that I'll gladly upvote a revised version. I don't think it will be a matter where the author of the accepted answer and I cannot reach convergence - I think that he just didn't think of a particular situation which makes the "can never happen" answer incorrect.<br>
It is not like trench wars about the correct prior or appropriateness of Bayesian vs. frequentist approaches</em> </p>

<p><strong>The concept of stackoverflow</strong> relies on the fact that other users can up- or downvote answers. Ultimately this <strong>should lead to good (including correct) answers floating on top</strong>. This concept also assumes that in case some issue discovered, all sides can react: the author of the answer can edit and the OP can even change the accepted answer. This <strong>relies on people staying active on CV/SX, but what if they aren't active any more?</strong> </p>

<p>Question and accepted answer are 1 1/2 years old. The OP's profile says that the OP never came back to the site after the day that question was asked and "answered". </p>

<p>(The author of the accepted answer was online here more recently (2 weeks ago) so he/she may edit the answer in reaction to my comment.)</p>

<p><s>I'll flag the question for moderator attention, but</s> I think it would be good to write down here how to proceed </p>

<ul>
<li>in case the OP doesn't show up again and react on the new situation. </li>
<li>in future if similar issues arise (the OP could have deleted his/her account meanwhile)</li>
</ul>

<p>To be even more clear: I think it is a perfectly valid policy to say that we don't do anyting in these situations. </p>

<p>I just think that it would be good to have the policy discussed and spelled out here (whatever it is).</p>
