A Simple Question with a Complicated Response
Two friends are chatting about what they are doing. One asks his friend what he is doing. The latter responds that he’s just separating oxygen into carbon dioxide, a typical activity.
This amazes the first friend, who thinks and explains that school is no longer in session, so what could he still be doing making science experiments. The second friend funnily answers that he only uses the terms oxygen and carbon dioxide to explain the process of breathing in and out.