Are people getting dumber?

I just saw a Who Wants to be a Millionaire question worth $8000 which asked:

Which of the following is not an integer?
a. 1
b. 1/2
c. 0
d. -2

AND THE GUY DIDNT KNOW AND USED A LIFELINE!

>>8
Fun Fact: If you live anywhere except America, you know what an integer is.

Americans are fucking stupid. No wonder they are ranked so low when it comes to mathematical literacy.