Introduction to Logic (MP3 download)

By Leonard PeikoffThis course (with exercises) covers the standard topics taught in introductory courses in Aristotelian logic. It defines the principles of valid reasoning, and discusses prevalent logical fallacies. It formalizes the steps by which one derives conclusions from premises, and it provides a methodology by which to evaluate one's own thinking processes. (Each lecture includes a question period.) 1. Basic Logical TheoryThe cognitive role of logic. The laws of logic and their validation. Logic vs. mysticism and subjectivism. Logic and reality.2-3. Informal FallaciesTwenty-two common fallacies, including: the appeal to authority, ad hominem, ad populum, ad ignorantiam, begging the question, equivocation, composition, division, misuse of the mean and false alternative.4. Introduction to Deductive ReasoningThe nature of deductive argument. Validity and truth. Mixed and pure hypothetical arguments. Alternative arguments.5.-6. The Aristotelian SyllogismCategorical propositions.