This is a lecture that the renowned philosopher, Daniel Dennett, gave at my college, the University of Memphis, on November 14. In this talk, titled "An evolutionary/computational theory of humor", Professor Dennett talks about the origin and purpose of humor from a perspective of evolutionary biology, psychology, and neuroscience. It is based on an upcoming book by Dennett titled "Inside Jokes" that I believe is coming out sometime early next year. Very interesting and funny. I apologize for the jumpiness, I recorded it with my iphone 4.