Any time you feel dumb, don't worry. Check out the following excerpts from a "Wall Street Journal" article by Jim Carlton. Lots of people are dumber than you.
Having just moved into his new office, a pompous, new colonel was sitting at his desk when an airman knocked on the door.
I'm writing you this letter to tell you that I'm leaving you forever. I've been a good man to you for 7 years & I have nothing to show for it. These last 2 weeks have been hell.
A first grade teacher collected well known proverbs. She gave each child in her class the first half of a proverb and asked them to come up with the remainder of the proverb. Their insight may surprise you.