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Slide 2 Slide 3 Four Rules of Aristotelian Logic 1. Rule of Identity: A is A 2. Rule of Non-Contradiction: A is not (-A) 3. Rule of Excluded Middle: Either A or (-A) 4. Rule of Rational Inference Slide 4 Slide 5 The building blocks of logical thought and reasoning: Argument: a collection of related propositions resulting in a conclusion Proposition: a declarative statement that affirms or denies something Premise: a proposition that sets forth a reason to draw a conclusion Conclusion: a proposition derived from the inferences of its premises Slide 6