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