<p>We have a tag <a href="https://stats.stackexchange.com/questions/tagged/control" class="post-tag" title="show questions tagged &#39;control&#39;" rel="tag">control</a> with 141 threads. It has no wiki excerpt and <a href="https://stats.stackexchange.com/questions/tagged/statistical-control" class="post-tag" title="show questions tagged &#39;statistical-control&#39;" rel="tag">statistical-control</a> is a synonym of it. The absence of a wiki excerpt is wise since the threads range from control groups, control variables, control assays, control charts (although we do have <a href="https://stats.stackexchange.com/questions/tagged/quality-control" class="post-tag" title="show questions tagged &#39;quality-control&#39;" rel="tag">quality-control</a> for those too), and so on.</p>

<p>It seems to me that the position could be simplified by removing the tag where another one would be more specific like <a href="https://stats.stackexchange.com/questions/tagged/clinical-trials" class="post-tag" title="show questions tagged &#39;clinical-trials&#39;" rel="tag">clinical-trials</a> or even <a href="https://stats.stackexchange.com/questions/tagged/regression" class="post-tag" title="show questions tagged &#39;regression&#39;" rel="tag">regression</a> or one of its cousins. If that leaves a core with a common meaning the tag could then be defined but it may be possible to eliminate it altogether.</p>
