A doctor, an engineer, and a politician werearguing as to which profession was older. “Well,” argued the doctor, “without aphysician mankind could not have survived, so I amsure that mine is the oldest profession.” “No,” said the engineer, “before life beganthere was complete chaos, and it took an engineerto create some semblance of order from this chaos.So engineering is older.” “But,” chirped the triumphant politician,”who created the chaos?”