Two hunters got a pilot to fly them into the far north for elk hunting. They were quite successful in their venture and bagged six big bucks. The pilot came back, as arranged, to pick them up. They started loading their gear into the plane, including the six elk. But the pilot objected and he said, "The plane can only take four of your elk; you will have to leave two behind." They argued with him; the year before they had shot six and the pilot had allowed them to put all aboard. The plane was the same model and capacity. Reluctantly, the pilot finally permitted them to put all six aboard. But