From a comment on Marginal Revolution - - Tyler Cowen was throwing out a question on what it means to be funny. For your next interview of a graduating engineer, ask (1.) how would you go about estimating the number of gas stations in the U.S., and (2.) tell me a joke.
"I don’t know how to describe what makes something funny, but I do know that you have to be smart to be funny. We all grew up with people who got terrible grades in school but we knew they were very smart, often smarter than the grinders who got straight A’s, because they were hilarious (and the grinders were not)."