When I date someone for the first time, I have one simple (subtle) test to determine their intelligence level. I always ask them when is their birthday, and I always tell them that mine is the February 31st. Depending on how long it takes them to pick up on that, is how I can gauge their level of stupidity. (Some of my close friends feel that if they agreed to date me in the first place, they obviously have a combination of low intelligence and even lower standards. What the...)