<p><a href="http://blog.stackoverflow.com/2008/09/ok-now-define-answered/">For future reference</a>:</p>
<blockquote>
<p>As of today, here’s how we do it:</p>
<ul>
<li><strong>Answered questions</strong> have at least one answer with one upvote (or accepted)</li>
<li><strong>Unanswered questions</strong> have no answers with upvotes (or accepted)</li>
</ul>
</blockquote>
<p>Read the full post - it explains the rationale behind these criteria.</p>
