Questions from the U.S. Naturalization test- How do you stack up?

I have a theory that once you leave school, you start to lose some of your cognitive reasoning skills. The rest of your life creeps in and crowds out a chunk of intellect when you’re no longer immersed in the day-to-day learning, assigned reading and writing essays.

The theory I have is that if I go back and get my doctorate then I’ll get smart again. That’s the theory, anyway.

Test your intellect with some questions adapted from the "Could you be a US citizen test?"