When we hear Aristotle’s name we often think first of “Aristotelian logic.” Other refined and modified systems of logic have been developed since Aristotle’s day, but he laid the foundation of formal logic. Aristotle did not invent logic any more than Columbus “invented” America. What Aristotle did was to define logic and set forth its fundamentals. In one sense he did not view logic as a separate science with its own field of inquiry, such as botany, physics, chemistry, and many other disciplines;