Why Did It Spill?

Have you heard the story about a person holding a cup of coffee? When the person is accidentally bumped into by someone else, coffee sloshes out of the cup onto the person’s shirt and the floor. When asked, “Why did you spill the coffee?” the person holding the cup replies, “Because someone bumped into me!”

That is not the entirely the correct answer though. Coffee was spilled because there was coffee inside the cup. Had there been tea in the cup, tea would have been spilled. Whatever is inside the cup is what will spill out.