#1. Always, & inevitably everyone underestimates the number of stupid people in circulation.
#2. The probability that anyone is stupid is independent of any other characteristic of that person.
#3. A stupid person is someone who causes losses to others without deriving gain, & even incurring losses.
#4. Non-stupid people always underestimate the power of stupid people - non-stupid people constantly forget that dealing with stupid people always turns out to be a costly mistake.

#5. A stupid person is the most dangerous type of person, more dangerous than a criminal.

-- Carlo Cipolla

@Gotterdammerung
#6 everyone is stupid somewhere