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| Preface | p. ix |
| Introduction | p. 1 |
| What good is logic? | p. 1 |
| Seventeen ways this book is different | p. 9 |
| The two logics (P)* | p. 15 |
| All of logic in two pages: an overview (B)* | p. 26 |
| The three acts of the mind (B) | p. 28 |
| The First Act of the Mind: Understanding | p. 35 |
| Understanding: the thing that distinguishes man from both beast and computer (P) | p. 35 |
| Concepts, terms and words (P) | p. 40 |
| The "problem of universals" (P) | p. 41 |
| The comprehension and extension of terms | p. 43 |
| Terms | p. 47 |
| Classifying terms | p. 47 |
| Categories (B) | p. 54 |
| Predicables (B) | p. 56 |
| Division (B) | p. 62 |
| Material Fallacies | p. 68 |
| Fallacies of language | p. 71 |
| Fallacies of diversion | p. 80 |
| Fallacies of oversimplification | p. 86 |
| Fallacies of argumentation | p. 92 |
| Inductive fallacies | p. 100 |
| Procedural fallacies | p. 104 |
| Metaphysical fallacies | p. 109 |
| Short Story: "Love Is a Fallacy" | p. 114 |
| Definition | p. 123 |
| The nature of definition (B) | p. 123 |
| The rules of definition (B) | p. 124 |
| The kinds of definition | p. 124 |
| The limits of definition | p. 129 |
| Second Act of the Mind: Judgment | p. 138 |
| Judgments, propositions, and sentences | p. 138 |
| What is truth? (P) | p. 143 |
| The four kinds of categorical propositions (B) | p. 145 |
| Logical form (B) | p. 147 |
| Euler's circles (B) | p. 152 |
| Tricky propositions | p. 153 |
| The distribution of terms | p. 163 |
| Changing Propositions | p. 166 |
| Immediate inference | p. 166 |
| Conversion (B) | p. 167 |
| Obversion (B) | p. 170 |
| Contraposition | p. 171 |
| Contradiction | p. 173 |
| What is contradiction? (B) | p. 173 |
| The Square of Opposition (B) | p. 174 |
| Existential import (P) | p. 179 |
| Tricky propositions on the Square | p. 181 |
| Some practical uses of the Square of Opposition | p. 183 |
| The Third Act of the Mind: Reasoning | p. 186 |
| What does "reason" mean? (P) | p. 186 |
| The ultimate foundations of the syllogism (P) | p. 187 |
| How to detect arguments | p. 190 |
| Arguments vs. explanations | p. 193 |
| Truth and validity | p. 194 |
| Different Kinds of Arguments | p. 200 |
| Three meanings of "because" | p. 200 |
| The four causes (P) | p. 202 |
| A classification of arguments | p. 205 |
| Simple argument maps (B) | p. 206 |
| Deductive and inductive arguments (B) | p. 210 |
| Combining deduction and induction: Socratic method (P) | p. 211 |
| Syllogisms | p. 215 |
| The structure and strategy of the syllogism (B) | p. 215 |
| The skeptic's objection to the syllogism (P) | p. 219 |
| The empiricist's objection to the syllogism (P) | p. 222 |
| Demonstrative syllogisms | p. 230 |
| How to construct convincing syllogisms (B) | p. 232 |
| Checking Syllogisms for Validity | p. 237 |
| By Euler's Circles (B) | p. 237 |
| By Aristotle's six rules (B) | p. 242 |
| "Barbara Celarent": mood and figure | p. 257 |
| Venn Diagrams | p. 258 |
| More Difficult Syllogisms | p. 264 |
| Enthymemes: abbreviated syllogisms (B) | p. 264 |
| Sorites: chain syllogisms | p. 275 |
| Epicheiremas: multiple syllogisms (B) | p. 279 |
| Complex argument maps | p. 282 |
| Compound Syllogisms | p. 289 |
| Hypothetical syllogisms (B) | p. 289 |
| "Reductio ad absurdum" arguments | p. 294 |
| The practical syllogism: arguing about means and ends | p. 296 |
| Disjunctive syllogisms (B) | p. 301 |
| Conjunctive syllogisms (B) | p. 303 |
| Dilemmas (B) | p. 306 |
| Induction | p. 313 |
| What is induction? | p. 313 |
| Generalization | p. 315 |
| Causal induction: Mill's methods | p. 319 |
| Scientific hypotheses | p. 325 |
| Statistical probability | p. 328 |
| Arguments from analogy | p. 329 |
| A fortiori and a minore arguments | p. 335 |
| Some Practical Applications of Logic | p. 342 |
| How to write a logical essay | p. 342 |
| How to write a Socratic dialogue | p. 344 |
| How to have a Socratic debate | p. 347 |
| How to use Socratic method on difficult people | p. 350 |
| How to read a book Socratically | p. 356 |
| Some Philosophical Applications of Logic | p. 358 |
| Logic and theology (P) | p. 358 |
| Logic and metaphysics (P) | p. 359 |
| Logic and cosmology (P) | p. 360 |
| Logic and philosophical anthropology (P) | p. 360 |
| Logic and epistemology (P) | p. 362 |
| Logic and ethics (P) | p. 362 |
| Problems with Mathematical Logic | p. 364 |
| Basic modern logic | p. 364 |
| The paradoxes of material implication | p. 366 |
| Responses to the paradoxes of material implication | p. 367 |
| Answers to Even-Numbered Exercises | p. 370 |
| Index of Principal Names | p. 400 |
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