A scientist has two large jars in front of him. One jar contains many fleas, the other jar is empty. He gently removes a flea from the flea jar, places it on the table before the empty jar, steps back, and commands “Jump,” whereupon the flea jumps into the empty jar. Methodically he gently removes [...]

A physicist, engineer and a statistician are out hunting. Suddenly, a deer appears 50 yards away. The physicist does some basic ballistic calculations, assuming a vacuum, lifts his rifle to a specific angle, and shoots. The bullet lands 5 yards short. The engineer adds a fudge factor for air resistance, lifts his rifle slightly higher, [...]