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What Is Logic?
The Analysis of Propositions
Inferences from Simple Propositions
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affirmative affirming the consequent alternation analytic antecedent argue argument assert axioms babies called categorical syllogism cats causal class calculus classical logic commit the fallacy conjunction construct contradictory contraposition deductive system definition disjunctive distributed example existential expression F F F F T F figure formal logic formal science formalist formula grampuses Hence Id.S Id.T illicit minor implies q inductive inference invalid large number law of noncontradiction least logic machines main column major premise material equivalence mathematics means ment method middle term Mill's Mill's methods minor negation negative number of instances obverse ordinary osition postulates predicate term principle proof propositional calculus prove q is false q is true relation rule sentence simple statements subject and predicate subject term substitution on variables superaltern Suppose syllogistic symbolic tautology theorem tion truth functions truth table truth values valid Venn diagrams