“I am a Prince," he replied, being rather dense. "It is the function of a Prince—value A—to kill monsters—value B—for the purpose of establishing order—value C—and maintaining a steady supply of maidens—value D. If one inserts the derivative of value A (Prince) into the equation y equals BC plus CD squared, and sets it equal to zero, giving the apex of the parabola, namely, the point of intersection between A (Prince) and B (Monster), one determines value E—a stable kingdom. It is all very complicated, and if you have a chart handy I can graph it for you.”