Why HN was down
Amazing that such a large percentage of debugging involves determining exactly <i>what</i> you are debugging. The definition of the problem, many times, is the solution.<p>Might be a good time to mention Rubber Duck Debuggging.  <a href="http://en.wikipedia.org/wiki/Rubber_duck_debugging" rel="nofollow">http://en.wikipedia.org/wiki/Rubber_duck_debugging</a>