Deductive logic isn't just for Socrates and Aristotle. Get back to the basics (and into the thick) with a simple, accessible introduction to deductive logic. Whether for the young or young at heart, If Cow leads the way through basic logic structure and one of the formal fallacies-one cow pie at a time. Other Titles in the Deductive Logic Series If Cow, Then Poo II: Modus Tollens and Denying the Antecedent Cow or Pig: Disjunctive Syllogism and the Inclusive "Or".