There are ten types of people in this world.
Those who can count in binary and those who can't.
I was reminded of this old math joke in a global warming thread. The assertion in defense of global warming was that for 100% of mathematicians, 1+1=2. I can only assume that it was an effort to make the point that on some things we legitimately all agree. But such areas of universal accord are narrower than is commonly perceived.