Unto the pure, all things are pure

(I will justify shortly that) to most people, the set of things in the world is divided as follows (not to scale): Things I do not know Things that I know Figure 1 For the past thirty years or so, I have always assumed that the set of things is as follows (not to scale): Things (I know that) I do not know Things that I know Things that I do not know that I do not know Figure 2 I spend most of my waking hours tranfering things from the yellow zone to the pink zone.  It is only too easy to lapse into Figure 1 thinking if I lower my guard. Why do I think most people think like in Figure 1? I draw this conclusion from the ridicule poured on Donald Rumsfeld from almost 100% of the press. Some thought it was poetry ! The BBC called it bizzare .  I don't know whether to believe that the British Plain English Campaign doesn't understand what Mr Rumsfeld was saying.  It appears that people do not realize there is a Figure 2. To me what Mr Rumsfeld said cou