- Always and inevitably everyone underestimates the number of stupid individuals in circulation.
- The probability that a certain person be stupid is independent of any other characteristic of that person.
- A stupid person is a person who causes losses to another person or to a group of people while deriving no gain and even possibly incurring losses themselves.
- Non-stupid people always underestimate the damaging power of stupid individuals.
- A stupid person is the most dangerous type of person. Carlo M. Cipolla