Original, and in fact would have happened if I were about five minutes faster on my feet and had more nerve. A professor of a class in introductory philosophy was attempting to make the point that few moral decisions are ever easy, so he hauled out a variant of an old hypothetical question. "Suppose," he began, "you are escaping from a sinking ship in a lifeboat, and there is one spot left, and the choice is between an old scientist and a young child. The scientist, while he has made great contributions to the knowledge and welfare of society, only has a few years of life left. The child has done nothing for the world, but has many years left to live. Which would you save?" After a moment of thought, a student in the class raised his hand. "Easy," he replied, "it doesn't matter at all." The professor was perplexed. "Well, you might be able to argue that position, but I hardly think it's an easy choice. Why doesn't it matter?" The student answered, "Well, one of them has to go anyway... and then the other one's a material witness."
(From the "Rest" of RHF)