[Smart] is an elusive concept. There's a certain sharpness, an ability to absorb new facts. To ask an insightful question. To relate to domains that may not seem connected at first. A certain creativity that allows people to be effective.
Source: Interview with Playboy.
-- William H Gates, (Oct 28 1955-____), US business executive; He co-founded Microsoft Corp., world's largest computer software company, 1975; at age 31 was the youngest person to become a billionaire.