Logic (Sigwart)

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Logic by Christoph von Sigwart, translated by Helen Bosanquet

Author's Preface to the English Translation→

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[edit] Volume I.

THE JUDGMENT, CONCEPT, AND INFERENCE

• Author's Preface to the English Translation
• Author's Preface to First German Edition
• Author's Preface to Second German Edition

• Introduction

§ 1. The Problem of Logic

§ 2. Limits to the Problem

§ 3. The Postulate of Logic

§ 4. The Divisions of Logic

• Part I. Analytical. The Nature of Judgment and its Presuppositions

§ 5. The Proposition as the Expression of the Judgment. Subject and Predicate

• Chapter I. Ideas as Elements of Judgments and their Relation to Words

§ 6. The Highest Categories of the Objects of Thought

§ 7. The General Idea and the Word

§ 8. Necessity of the Word as Predicate

• Chapter II. Simple Judgments

I. Narrative Judgments

§ 9.   Denominative Judgments

§ 10. Judgments of Attributes and Activities

§ 11. Impersonal Judgments and Allied Forms

§ 12. Relational Judgments. Existential Propositions

§ 13. Judgments about Abstract Nouns

§ 14. The Objective Validity of the Judgment, and the Principle of Identity

§ 15. The Reference to Time in Narrative Judgments

II.   § 16. Explicative Judgments

III. § 17. The Act of Judgment as expressed in Language

• Chapter III. How Judgments arise, and the Distinction between Analytical and Synthetical Judgments

§ 18. Immediate and Mediated, Analytical and Synthetical Judgments

§ 19. The Process of the Synthetical Judgment

• Chapter IV. The Negation

§ 20. The Negation as Denial of the Judgment

§ 21. The Different Kinds of Negative Judgments

§ 22. Privation and Opposition as Ground of the Negation

§ 23. The Principle of Contradiction

§ 24. The Principle of Twofold Negation

§ 25. The Principle of the Excluded Middle

• Chapter V. Plural Judgments

I. Positive Plural Judgments

§ 26. Positive Copulative and Plural Judgments

§ 27. The Universal Affirmative Judgment

§ 28. The Particular Affirmative Judgment

II.   § 29. Negative Plural Judgments

III. § 30. The Negation of Plural Judgments

• Chapter VI. Possibility and Necessity

I.     § 31. The so-called Modal Distinctions

§ 32. The Law of Sufficient Reason

II. Possible and Necessary as Predicates of Actual Judgments

§ 33. The Necessity of Reality

§ 34. Possibility

• Chapter VII. Hypothetical and Disjunctive Judgments

I.     § 35. The Different Ways in which Propositions may be Combined, and their Logical Significance

II.   § 36. The Hypothetical Judgment

III. § 37. The Disjunctive Judgment

Results § 38.

• Part II. Regulative

§ 39. The Conditions of Perfect Judgments

• Chapter I. The Concept

§ 40. Nature of the Logical Concept

§ 41. Analysis of the Concept into Simple Elements

§ 42. Super- and Subordination, Content and Extension of Concepts

§ 43. Division of Concepts

§ 44. Definition

• Chapter II. The Truth of Immediate Judgments

§ 45. The Truth of Judgments about Concepts

§ 46. The Truth of Statements about Ourselves

§ 47. The Truth of Judgments of Perception

§ 48. Axioms and Postulates

• Chapter III. The Rules of Inference as the Ground for Mediated Judgments

§ 49. The Hypothetical Syllogism

§ 50. The Introduction of a Subject in the Hypothetical Syllogism

§ 51. The Different Sources of Hypothetical Major Premises

§ 52. Inferences according to Formal Logical Laws

§ 53. Inferences from Relations between Concepts

§ 54. The meaning of the Aristotelian Figures and Moods

§ 55. The Value of the Syllogism

§ 56. The Inference of Subsumption

§ 57. The Inference from Divisive Judgments

§ 58. The Disjunctive Syllogism

§ 59. The Relation between the Truth of the Conclusion and the Truth of the Premises

• Appendix A
• Appendix B
• Appendix C

[edit] Volume II.

LOGICAL METHODS

This translation is hosted with different licensing information than from the original text. The translation status applies to this edition.
Original:	This work published before January 1, 1923 is in the public domain worldwide because the author died at least 100 years ago.
Translation:	This work is in the public domain in the United States because it was published before January 1, 1923. The author died in 1925, so this work is also in the public domain in countries and areas where the copyright term is the author's life plus 80 years or less. This work may also be in the public domain in countries and areas with longer native copyright terms that apply the rule of the shorter term to foreign works.