I am very proud to say that as a school boy I managed a 4% mark in a multiple choice Economics exam. Zero would have been perfect. I knew that by randomly ticking a box I would score 33.3%, so 4% really showed my understanding of the subject. I have often wondered which 4 questions I accidentally got 'right'. My Economics master disagreed. He told me to read the newspapers and follow the news so that I could gain a proper understanding of the world and the way it works. He did not realise that my 4% showed that even then I had been doing just that for many years. What I had learned I did not like.