[RinAZ2005]

I was taught there are two types of people in the world: Those who divide people into two types, and those who don't.

[decal]

"I was taught there are two types of people in the world: Those who divide people into two types, and those who don't."

There are 10 types of people in the world: those who know binary and those who don't.

[doug from upland]

There are three kinds of people in the world --- those who know how to count and those who don't.