Once upon a time there was an experimental psychologist who, not unsurprisingly, designed an experiment. This experiment, amongst other things, asked people to rate their sense of humour, i.e. did they think their sense of humour was below average, average or above average.

Interestingly around 90% of people thought they had a better sense of humour than most people. Now even the most mathematically challenged amongst you should recognise that this is not possible. It reflects what is known in psychology as the pollyanna phenonemon, which is that most people have an unrealistically positive view of themselves.

Further research and thought by minds greater than mine have decided that this is, in fact, a mark of a healthy mind. The only people who have been found to have an accurate view of themselves are manic depressives.

OK, you're right, I do have a greater mind than those pedestrian researchers locked away in their ivory towers. (Or is that just my positive self image?)