<p>It's possible the post or the entire thread was deleted, in which case it will be inaccessible to most (and difficult even for moderators to find).  Let's assume that's not the case.</p>

<p>Although our site offers some useful search options (such as searching according to question or answer, number of votes, and so on) it can be useful to exploit Web search engines.  For instance, in this case you remembered the name of a user and some key words.  You can use them in a Google search like this:</p>

<blockquote>
  <p><a href="https://www.google.com/webhp?ion=1&amp;espv=2&amp;ie=UTF-8#q=site%3Astats.stackexchange.com%20whuber%20probability%20integral%20transform" rel="nofollow noreferrer">site:stats.stackexchange.com whuber probability integral transform</a></p>
</blockquote>

<p>There are some promising hits.  The trick (obviously) is the <code>site:</code> part of the search string.  It focuses on our entire site and it can pick up comments.</p>

<p>As a general rule, using my name in a Google search is not going to be helpful: in my role as moderator I have commented on a sizable proportion of all threads.  One <em>site</em> search option I have found very helpful, though, is to include the id of any user you think might have contributed a question or answer.  You will have to use our own site search capability for this.  For example, I recall user "glen_b" wrote at least one nice answer about histograms.  A good way, then, to find this answer--and possibly others like it--is to look up his id (search for it on the <a href="https://stats.stackexchange.com/users">Users page</a>) and include it in the search:</p>

<blockquote>
  <p><a href="https://stats.stackexchange.com/search?tab=votes&amp;q=user%3a805%20histogram">user:805 histogram</a></p>
</blockquote>

<p>Sorting the results by votes brings the post I was looking for right to the top of a set of related posts.</p>
