I can't make any sense of this puzzle.

Here is something maddening. A puzzle solved has created a puzzle.

I have worked out why there are so many structures with 7 levels in the Taxonomy.  That was a relief because it was the commonest criticism.  I would be accused of a love affair with 7, or just laughed at.  

However, the reason is simpler and more fascinating than love. Nor does it deserve ridicule.  It occurs because  More...