User blog comment:Antares.I.G.Harrison/Complete Graham Notation/@comment-10429372-20150307075521

Also, how to cause a time error:

Result: The uppermost comment will say 1 minute ago, while that one below says 1 second ago. With four comments below I had 1 second ago, 7 minutes ago, 1 minute ago, 3 minutes ago.
 * 1) Post a comment.
 * 2) Post another comment.
 * 3) Wait a minute.
 * 4) Edit the uppermost comment.