Calvin and Hobbes by Bill Watterson for June 28, 1988
Calvin: Mom, can Hobbes come in swimming with me? Mom: I don't think he'd better, Calvin. Calvin: Why not? Mom: Um...tigers don't swim very well. Calvin: They don't? Hobbes: Frankly, I'm not sure your mom know so much about tigers. Calvin: Look, we just want to avoid an argument, right?