Calvin and Hobbes by Bill Watterson for June 06, 1988
Calvin: You know what we need, Hobbes? We need an attitude. Hobbes: An attitude? Calvin: Yeah, you can't be cool if you don't have an attitude. Hobbes: Really? Calvin: Sure. They're all the rage. Now what kind of attitude could we have. Hobbes: We could be courtously differential. Calvin: Oh, good. That's real cool.