A Philosophical Inquiry Into the Nature of Stupidity

Ace of Spades links to a treatise on stupidity.  The Second Law is:

The probability that a certain person be stupid is independent of any other characteristic of that person.

This is consistent with my contention that, in any given group of people, 10% of the group will be jerks. I would propose this as a corollary to the laws of stupidity, as many stupid people are jerks