Three Medical Practioners On A Duck Shooting Party
As the first bird flies overhead, the GP takes aim, saying—"Well, it looks like a duck, and flies like a duck, but I'd like a second opinion" … and he lowers his gun.
A second bird passes overhead, and the pathologist takes aim. "Hm, it has typical duck markings … and it sounds like a duck … but I'm not certain" … and he lowers his gun without firing.
Another duck appears. The surgeon raises his gun quickly. Bang! Bang Bang! his gun rings out. "Hey, go see if that was a duck, will ya?"