<p>Where the newer post has a more canonical question (one people would search for), and the answers on the older question will work well as answers for new one, it may sometimes be better to merge into the newer post, which will move the answers across.</p>

<p>In some cases the best strategy may be to post a new more canonical version of the question (which has the advantage that you can tailor the question a little toward the more specific questions that already exist) and merge <em>both</em> existing questions into the new one.</p>
