There are X kinds of people in the world:

there are possibly 2 1/2 (or
impossibly 3) individuals
every several fat thousand years;
expecting more would be neither fan
tastic nor pathological but dumb
-ee cummings

There are two kinds of people in the world: those who dichotomize and those who don’t.

There are two secrets to success in business. The first is, don’t tell anyone everything you know.

Those who do things in the right order and those who dont. There are two kinds of people in the world.
There are two kinds of people in the world. Those who know you can mark white text to view it, and those who don’t.

There are two kinds of people in the world: Category 1 and Category B.

Two kinds of people.

There are those who know haiku,

and those who do not.

NERD ALERT for the next one:

There are 1 + i kinds of people in the world. Those who are rational and those who aren’t.
There are hundred kinds of people in the world. Those who over-exaggerate and those who dont.
There are two kinds of people in the world. Those who have something proper to do on a Friday night, and me.