Logic (Sigwart)

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Volume I.[edit]

THE JUDGMENT, CONCEPT, AND INFERENCE


§ 1. The Problem of Logic
§ 2. Limits to the Problem
§ 3. The Postulate of Logic
§ 4. The Divisions of Logic
§ 5. The Proposition as the Expression of the Judgment. Subject and Predicate
§ 6. The Highest Categories of the Objects of Thought
§ 7. The General Idea and the Word
§ 8. Necessity of the Word as Predicate
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
§ 18. Immediate and Mediated, Analytical and Synthetical Judgments
§ 19. The Process of the Synthetical Judgment
§ 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
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
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
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.

§ 39. The Conditions of Perfect Judgments
§ 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
§ 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
§ 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


Volume II.[edit]

LOGICAL METHODS