| Preface | p. v |
| Symbolizing Sentences | p. 1 |
| Sentences | p. 1 |
| Sentential Connectives | p. 2 |
| The Form of Molecular Sentences | p. 5 |
| Symbolizing Sentences | p. 9 |
| The Sentential Connectives and Their Symbols | p. 12 |
| Or | p. 14 |
| Not | p. 16 |
| If ... then ... | p. 19 |
| Grouping and Parentheses | p. 21 |
| The Negation of a Molecular Sentence | p. 29 |
| Elimination of Some Parentheses | p. 33 |
| Summary | p. 35 |
| Logical Inference | p. 43 |
| Introduction | p. 43 |
| Rules of Inference and Proof | p. 44 |
| Modus Ponendo Ponens | p. 44 |
| Proofs | p. 48 |
| Two-Step Proofs | p. 49 |
| Double Negation | p. 52 |
| Modus Tollendo Tollens | p. 54 |
| More on Negation | p. 58 |
| Adjunction and Simplification | p. 61 |
| Disjunctions as Premises | p. 64 |
| Modus Tollendo Ponens | p. 65 |
| Sentential Derivation | p. 69 |
| More About Parentheses | p. 77 |
| Further Rules of Inference | p. 79 |
| Law of Addition | p. 80 |
| Law of Hypothetical Syllogism | p. 83 |
| Law of Disjunctive Syllogism | p. 88 |
| Law of Disjunctive Simplification | p. 92 |
| Commutative Laws | p. 95 |
| De Morgan's Laws | p. 98 |
| Biconditional Sentences | p. 103 |
| Summary of Rules of Inference | p. 107 |
| Table of Rules of Inference | p. 108 |
| Truth and Validity | p. 110 |
| Introduction | p. 110 |
| Truth Value and Truth-Functional Connectives | p. 111 |
| Conjunction | p. 111 |
| Negation | p. 112 |
| Disjunction | p. 113 |
| Conditional Sentences | p. 114 |
| Equivalence: Biconditional Sentences | p. 117 |
| Diagrams of Truth Value | p. 118 |
| Invalid Conclusions | p. 122 |
| Conditional Proof | p. 129 |
| Consistency | p. 138 |
| Indirect Proof | p. 146 |
| Summary | p. 152 |
| Truth Tables | p. 161 |
| Truth Tables | p. 161 |
| Tautologies | p. 169 |
| Tautological Implication and Tautological Equivalence | p. 171 |
| Summary | p. 176 |
| Terms, Predicates, and Universal Quantifiers | p. 180 |
| Introduction | p. 180 |
| Terms | p. 183 |
| Predicates | p. 185 |
| Common Nouns as Predicates | p. 187 |
| Atomic Formulas and Variables | p. 191 |
| Universal Quantifiers | p. 197 |
| Two Standard Forms | p. 205 |
| Universal Specification and Laws of Identity | p. 211 |
| One Quantifier | p. 211 |
| Two or More Quantifiers | p. 223 |
| Logic of Identity | p. 230 |
| Truths of Logic | p. 236 |
| A Simple Mathematical System: Axioms for Addition | p. 241 |
| Commutative Axiom | p. 241 |
| Associative Axiom | p. 245 |
| Axiom for Zero | p. 255 |
| Axiom for Negative Numbers | p. 258 |
| Universal Generalization | p. 263 |
| Theorems with Variables | p. 263 |
| Theorems with Universal Quantifiers | p. 267 |
| Index | p. 273 |
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