[Runesmith]

An internist, a cardiologist, a surgeon, and a pathologist go duck hunting. Suddenly, a gaggle of geese fly overhead.

The internist raises his gun, but thinks, "I'd better do a differential diagnosis on whether these are ducks or geese." He puts his gun down without shooting.

The cardiologist raises his gun, but thinks, "I need to assess functional reserve of those ducks and pick the most compromised." He lowers his gun.

The surgeon raises his gun. Blam! Blam! Blam! He blasts them out of the sky. Then he turns to the pathologist and asks, "What were those things anyway?"