These are some of the documented delusions of Brits, for your amusement (or sympathy):

Your body, or part of your body, is misshapen or ugly: 46.4%

You are not in control of some of your actions: 44.3%

You are an exceptionally gifted person that others do not recognise: 40.5%

Certain places are duplicated, i.e. are in two different locations at the same time: 38.7%

People say or do things that contain special messages for you: 38.5%

Certain people are out to harm or discredit you: 33.8%

Your thoughts are not fully under your control: 33.6%

There is another person who looks and acts like you: 32.7%

Some people are duplicated, i.e. are in two places at the same time: 26.2%

People you know disguise themselves as others to manipulate or influence you: 24.9%

(Graham Lawton, deputy editor New Scientist)

There are host of other delusions, political and military. The amazing thing is not the variety of delusions but the large proportion of the population that subscribe to one or more of them. It seems unbelievable, but comes from the reliable New Scientist. Epicureanism, I’m glad to report, does represent a respectable level of rational thought.