Calvin and Hobbes by Bill Watterson for March 16, 1994
Hobbes: Don't you think you'd enjoy this more if you did your math assignment first, so it wasn't hanging over your head? Calvin: I'm a practical man, Hobbes. I don't waste time thinking about hypothetical situations. I deal with the world her and now. And the incontrovertible fact is that I'm outside in the snow! That's reality! That's what I think about! Hobbes: Tomorrow's a reality too. Calvin: Hypothtically, it might be another snow day.