A bunch of engineers are sitting around at a party, discussing the wonder of the human body and its implications about the nature of God.
The mechanical engineer states that God must also be a mechanical engineer because “if you look at all the pulleys and levers that drive the body, how the tendons and muscles and bones all work together, well, it’s just amazing.”
“No, no, no,” disagrees the chemical engineer. “God has to be a chemical engineer because if you look at all the chemical processes that drive the body, how the hormones and the brain and the glands and everything else all interact, well, it’s just astounding.”
“Wrong!” snaps the electrical engineer. “God has to be an electrical engineer because if you look at the circuitry of the body, how the thousands upon millions of nerve cells transmit signals from one part to another, well, it boggles the mind.”
At this point, a mathematician, who has been listening to the conversation with some interest, speaks up. “No, no, you’ve all three got it wrong,” he says. “God is definitely a civil engineer.”
“How do you figure?” the engineers demand.
The mathematician shrugs. “Only a civil engineer would run a sewer right through the middle of a playground.”