Calvin and Hobbes by Bill Watterson for January 06, 1988
Calvin: Here's another problem I can't figure out. What's 9+4? Hobbes: Ooh, that's a tricky one. You have to use calculus and imaginary numbers for this. Calvin: Imaginary numbers?! Hobbes: You know eleventeen, thirty-twelve, and all those little confusing at first. Calvin: How did you learn all this? You've never even gone to school! Hobbes: Instinct. Tigers are born with it.