A defence lawyer questioning a witness in a drunk-driving case asked, "Officer, you say you are absolutely sure the defendant was intoxicated?"
"Yes, sir," was the answer.
"And how long have you been with the police?"
"Six months," replied the officer.
"After only six months on the force," continued the defence attorney, "you are able to say with certainty that the defendant was intoxicated?"
"Well, before I joined the force," replied the rookie, "I was a bartender for 16 years."