Five doctors went duck hunting. Included in the group were a general practitioner, a pediatrician, a psychiatrist, a surgeon and a pathologist.
After a time, a bird came winging overhead. The first to react was the GP, who raised his shotgun but then hesitated.
"I'm not quite sure it's a duck," he said. "I think I need to get a second opinion." Of course, by that time, the bird was long gone.
Another bird soon appeared. This time, the pediatrician drew a bead on it. He too, however, was unsure if it was really a duck and, besides, it might have babies. "I'll have to do some more investigating," he muttered, as the creature made good its escape.
Next to spy a bird overhead was the sharp-eyed psychiatrist. Shotgun shouldered, he was more certain of his intended prey's identity.
"Now, I know it's a duck, but does it know it's a duck?" he wondered. The fortunate bird disappeared while the fellow wrestled with this dilemma.
Finally, a fourth fowl sped past. The surgeon immediately pointed his weapon skyward and -- BOOM! -- dropped the creature in a heartbeat.
Lowering his smoking gun, the surgeon turned nonchalantly to the pathologist beside him.
"Go see if that was a duck, will you?"