Three Engineers

A mechanical, electrical, and civil engineer are talking about the profession of God. The mechanical engineer says "God must be a mechanical engineer. Look at all the joints of the human body! Look at how it is constructed. Difinitly a mechanical engineer".
The electrical engineer says "no way! God's an electrical engineer. Look at the nervous system".
Finally, the civil engineer ends the argument with "You're both wrong. God is a civil engineer. Who else would have run a waste disposal pipeline through a great recreational area?"