Whenever we choose to describe some device or process with mathematical equations based on physical principles, we always leave the real world behind, to a greater or lesser degree. … These approximations may, in individual cases, be good, fair, or poor, but some discrepancy between modeled and real behavior always exists.
E.O. Doebelin. 1995. Engineering Experimentation. New York: McGraw-Hill.
Exercising the right of occasional suppression ...