Introduction to Deductive Reasoning and Mathematics III

Before examining some formal rules of deductive logic, we should observe that Aristotle invented logic and we should examine the three so-called Fundamental Rules of Thought which he formulated.  You may read more about Aristotle’s involvement with the beginnings of logic. https://oregonstate.edu/instruct/phl201/modules/Philosophers/Aristotle/aristotle_laws_of_thought.html  The Three Fundamental Rules of Thought The Law of Identity Whatever is, is;