Introduction
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Book I. General and Historical Survey of Logic
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| Chapter 1. Critical Analysis of Logical Theories
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| 1. Logic's Promises
| 1
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| 2. Of Minute Accuracy
| 8
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| 3. Different Methods in Logic
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| Chapter 2. Partial Synopsis of a Proposed Work in Logic
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| 1. Originality, Obsistence, and Transuasion 79
| 79
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| 2. Terms, Propositions, and Arguments
| 95
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| 3. Clearness of Ideas
| 98
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| 4. Abduction, Deduction, and Induction
| 100
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| 5. Speculative Rhetoric
| 105
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| 6. Objective Logic
| 111
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| Chapter 3. Why Study Logic?
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| 1. The Pre-Logical Sciences
| 119
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| 2. Ten Pre-Logical Opinions
| 123
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| 3. The Objectivity of Truth
| 135
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| 4. Direct Knowledge
| 140
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| 5. Reasoning and Expectation
| 144
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| 6. The Fallibility of Reasoning and the Feeling of Rationality
| 151
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| 7. Reasoning and Conduct
| 175
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| 8. Reasoning and Consciousness
| 179
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| 9. Logica Utens
| 186
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| 10. Logica Utens and Logica Docens
| 188
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| 11. The Improvement of Reasoning
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| 12. Esthetics, Ethics, and Logic
| 196
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| 13. Utility of Logical Theory
| 201
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| 14. Logic
| 203
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Book II. Speculative Grammar
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| Chapter 1. Ethics of Terminology
| 219
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| Chapter 2. Division of Signs
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| 1. Ground, Object, and Interpretant
| 227
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| 2. Signs and Their Objects
| 230
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| 3. Division of Triadic Relations
| 233
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| 4. One Trichotomy of Signs
| 243
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| 5. A Second Trichotomy of Signs
| 247
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| 6. A Third Trichotomy of Signs
| 250
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| 7. Ten Classes of Signs
| 254
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| 8. Degenerate Signs
| 265
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| 9. The Trichotomy of Arguments
| 266
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| 10. Kinds of Propositions
| 271
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| 11. Represent
| 273
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| Chapter 3. The Icon, Index and Symbol
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| 1. Icons and Hypoicons
| 274
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| 2. Genuine and Degenerate Indices
| 283
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| 3. The Nature of Symbols
| 292
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| 4. Sign
| 303
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| 5. Index
| 305
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| 6. Symbol
| 307
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| Chapter 4. Propositions
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| 1. The Characteristics of Dicisigns 309
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| 2. Subjects and Predicates
| 315
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| 3. Dichotomies of Propositions
| 323
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| 4. A Pragmatic Interpretation of the Logical Subject
| 328
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| 5. The Nature of Assertion
| 332
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| 6. Rudimentary Propositions and Arguments
| 344
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| 7. Subject
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| 8. Predicate
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| 9. Predication
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| 10. Quantity
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| 11. Universal
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| 12. Particular
| 372
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| 13. Quality
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| 14. Negation
| 378
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| 15. Limitative
| 381
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| 16. Modality
| 382
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| Chapter 5. Terms.
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| 1. That these Conceptions are not so Modern as has been Represented
| 391
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| 2. Of the Different Terms applied to the Quantities of Extension and Comprehension
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| 3. Of the Different Senses in which the Terms Extension and Comprehension have been accepted
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| 4. Denials of the Inverse Proportionality of the Two Quantities, and Suggestions of a Third Quantity
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| 5. Three Principal Senses in which Comprehension and Extension will be taken in this Paper
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| 6. The Conceptions of Quality, Relation, and Representation, applied to this Subject
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| 7. Supplement of 1893
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| 8. Signification and Application
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| Chapter 6. The Grammatical Theory of Judgement and Inference
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| 1. Judgements
| 435
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| 2. Inference
| 442
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Book III. Critical Logic
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| A. Explicative Reasoning
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| Chapter 1. The Aristotelian Syllogistic
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| 1. Pretensions of Demonstrative Reasoning 445
| 445
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| 2. Rules and Cases
| 452
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| 3. The Quadrant
| 455
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| Chapter 2. On the Natural Classification of Arguments
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| Part I
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| 1. Essential Parts of an Argument
| 461
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| 2. Relations between the Premisses and Leading Principle
| 465
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| 3. Decomposition of Argument
| 468
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| 4. Of a General Type of Syllogistic Argument
| 471
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| Part II
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| 1. Of Apagogical Forms 475
| 475
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| 2. Of Contradiction
| 476
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| 3. Of Barbara
| 478
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| 4. Of the First Figure
| 479
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| 5. Second and Third Figures
| 480
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| 6. The Theophrastean Moods
| 500
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| 7. Mathematical Syllogisms
| 507
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| Part III
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| 1. Induction and Hypothesis
| 508
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| 2. Moods and Figures of Probable Inference
| 512
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| 3. Analogy
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| 4. Formal Relations of the Above Forms of Arguments
| 514
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| Chapter 3. Extension of the Aristotelian Logic
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| 1. On a Limited Universe of Marks
| 517
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| 2. General Canon of Syllogism
| 528
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| 3. Hamilton's Quantification of the Predicate
| 532
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| 4. Universe of Discourse
| 536
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| Chapter 4. Notes on Explicative Reasoning
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| 1. Logical
| 537
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| 2. Pure
| 544
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| 3. Organon
| 547
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| 4. Intention
| 548
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| 5. Material Logic
| 549
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| 6. Logical Contraposition and Conversion
| 550
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| 7. Obversion
| 551
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| 8. Syllogism
| 552
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| 9. Middle Term and Middle
| 581
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| 10. Premise and Premiss
| 582
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| 11. Mnemonic Verses and Words
| 584
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| 12. Reduction
| 585
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| 13. Leading Principle
| 588
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| 14. Nota Notæ
| 590
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| 15. Laws of Thought
| 593
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| 16. Regular Proof
| 601
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| 17. Pertinent
| 602
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| 18. Implicit
| 603
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| 19. Observation
| 606
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| 20. Spurious Proposition
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| 21. Opposition
| 608
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| 22. Inconsistency
| 609
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| 23. Reductio ad Absurdum
| 612
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| 24. Fallacies
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| 25. Insolubilia
| 618
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| B. Ampliative Reasoning
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| Chapter 5. Deduction, Induction and Hypothesis
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| 1. Rule, Case, and Result
| 619
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| 2. Baroco and Bocardo; Hypothesis and Induction
| 626
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| 3. Rules for Induction and Hypotheses
| 632
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| 4. Empirical Formulae and Theories
| 636
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| 5. On the Difference between Induction and Hypothesis
| 641
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| Chapter 6. The Doctrine of Chances
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| 1. Continuity and the Formation of Concepts
| 645
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| 2. The Problem of Probability
| 647
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| 3. On Degrees of Probability
| 649
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| 4. Three Logical Sentiments
| 652
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| 5. Fundamental Rules for the Calculation of Chances
| 656
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| 6. Notes on the Doctrine of Chances
| 661
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| Chapter 7. The Probability of Induction
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| 1. Rules for the Addition and Multiplication of Probabilities
| 669
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| 2. Materialistic and Conceptualistic Views of Probability
| 673
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| 3. On the Chance of Unknown Events
| 680
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| 4. On the Probability of Synthetical Inferences
| 685
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| 5. The Rationale of Synthetic Inference
| 690
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| Chapter 8. A Theory of Probable Inference
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| 1. Probable Deduction and Probability in General
| 694
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| 2. Statistical Deduction
| 698
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| 3. Induction
| 702
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| 4. Hypothetic Inference
| 704
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| 5. General Characters of Deduction, Induction, and Hypothesis
| 708
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| 6. Induction and Hypothesis; Indirect Statistical Inferences; General Rule for their Validity
| 715
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| 7. First Special Rule for Synthetic Inference. Sampling must be Fair. Analogy
| 725
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| 8. Second Special Rule for Synthetic Inference, that of Predesignation
| 735
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| 9. Uniformities
| 741
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| 10. Constitution of the Universe
| 744
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| 11. Further Problems
| 751
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| Chapter 9. The Varieties and Validity of Induction
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| 1. Crude, Quantitative, and Qualitative Induction
| 775
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| 2. Mill on Induction
| 761
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| Chapter 10. Notes on Ampliative Reasoning
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| 1. Reasoning
| 773
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| 2. Validity
| 779
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| 3. Proof
| 782
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| 4. Probable Inference
| 783
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| 5. Predesignate
| 788
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| 6. Presumption
| 791
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| Appendix. Memoranda Concerning the Aristotelian Syllogism
| 792
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