| Preface to the English Edition | xi |
| Foreword | xiii |
| Introduction | |
1. | What is Logical Syntax? | 1 |
2. | Languages as Calculi | 4 |
Part I. | The Definite Language I | |
A. | Rules of Formation for Language I | |
3. | Predicates and Functors | 11 |
4. | Syntactical Gothic Symbols | 15 |
5. | The Junction Symbols | 18 |
6. | Universal and Existential Sentences | 20 |
7. | The K-Operator | 22 |
8. | The Definitions | 23 |
9. | Sentences and Numerical Expressions | 25 |
B. | Rules of Transformation for Language I | |
10. | General Remarks Concerning Transformation Rules | 27 |
11. | The Primitive Sentences of Language I | 29 |
12. | The Rules of Inference of Language I | 32 |
13. | Derivations and Proofs in Language I | 33 |
14. | Rules of Consequence for Language I | 37 |
C. | Remarks on the Definite Form of Language | |
15. | Definite and Indefinite | 44 |
16. | On Intuitionism | 46 |
16a. | Identity | 49 |
17. | The Principle of Tolerance in Syntax | 51 |
Part II. | The Formal Construction of the Syntax of Language I | |
18. | The Syntax of I can be Formulated in I | 53 |
19. | The Arithmetization of Syntax | 54 |
20. | General Terms | 58 |
21. | Rules of Formation: 1. Numerical Expressions and Sentences | 62 |
22. | Rules of Formation: 2. Definitions | 66 |
23. | Rules of Transformation | 73 |
24. | Descriptive Syntax | 76 |
25. | Arithmetical, Axiomatic, and Physical Syntax | 78 |
Part III. | The Indefinite Language II | |
A. | Rules of Formation for Language II | |
26. | The Symbolic Apparatus of Language II | 83 |
27. | The Classification of Types | 84 |
28. | Formation Rules for Numerical Expressions and Sentences | 87 |
29. | Formation Rules for Definitions | 88 |
B. | Rules of Transformation for Language II | |
30. | The Primitive Sentences of Language II | 90 |
31. | The Rules of Inference of Language II | 94 |
32. | Derivations and Proofs in Language II | 95 |
33. | Comparison of the Primitive Sentences and Rules of II with those of other Systems | 96 |
C. | Rules of Consequence for Language II | |
34a. | Incomplete and Complete Criteria of Validity | 98 |
34b. | Reduction | 102 |
34c. | Evaluation | 106 |
34d. | Definition of 'Analytic in II' and 'Contradictory in II' | 110 |
34e. | On Analytic and Contradictory Sentences of Language II | 115 |
34f. | Consequence in Language II | 117 |
34g. | Logical Content | 120 |
34h. | The Principles of Induction and Selection are Analytic | 121 |
34i. | Language II is Non-Contradictory | 124 |
35. | Syntactical Sentences which Refer to Themselves | 129 |
36. | Irresoluble Sentences | 131 |
D. | Further Development of Language II | |
37. | Predicates as Class-Symbols | 134 |
38. | The Elimination of Classes | 136 |
38a. | On Existence Assumptions in Logic | 140 |
38b. | Cardinal Numbers | 142 |
38c. | Descriptions | 144 |
39. | Real Numbers | 147 |
40. | The Language of Physics | 149 |
Part IV. | General Syntax | |
A. | Object-Language and Syntax-Language | |
41. | On Syntactical Designations | 153 |
42. | On the Necessity of Distinguishing between an Expression and its Designation | 156 |
43. | On the Admissibility of Indefinite Terms | 160 |
44. | On the Admissibility of Impredicative Terms | 162 |
45. | Indefinite Terms in Syntax | 165 |
B. | The Syntax of any Language | |
(a) | General Considerations | |
46. | Formation Rules | 167 |
47. | Transformation Rules; d-Terms | 170 |
48. | c-Terms | 172 |
49. | Content | 175 |
50. | Logical and Descriptive Expressions; Sub-Language | 177 |
51. | Logical and Physical Rules | 180 |
52. | L-Terms; 'Analytic' and 'Contradictory' | 182 |
(b) | Variables | |
53. | Systems of Levels; Predicates and Functors | 186 |
54. | Substitution; Variables and Constants | 189 |
55. | Universal and Existential Operators | 196 |
56. | Range | 199 |
57. | Sentential Junctions | 200 |
(c) | Arithmetic; Non-Contradictoriness; the Antinomies | |
58. | Arithmetic | 205 |
59. | The Non-Contradictoriness and Completeness of a Language | 207 |
60a. | The Antinomies | 211 |
60b. | The Concepts 'True' and 'False' | 214 |
60c. | The Syntactical Antinomies | 217 |
60d. | Every Arithmetic is Defective | 220 |
(d) | Translation and Interpretation | |
61. | Translation from One Language into Another | 222 |
62. | The Interpretation of a Language | 227 |
(e) | Extensionality | |
63. | Quasi-Syntactical Sentences | 233 |
64. | The Two Interpretations of Quasi-Syntactical Sentences | 237 |
65. | Extensionality in Relation to Partial Sentences | 240 |
66. | Extensionality in Relation to Partial Expressions | 243 |
67. | The Thesis of Extensionality | 245 |
68. | Intensional Sentences of the Autonymous Mode of Speech | 247 |
69. | Intensional Sentences of the Logic of Modalities | 250 |
70. | The Quasi-Syntactical and the Syntactical Methods in the Logic of Modalities | 256 |
71. | Is an Intensional Logic necessary? | 257 |
(f) | Relational Theory and Axiomatics | |
71a. | Relational Theory | 260 |
71b. | Syntactical Terms of Relational Theory | 262 |
71c. | Isomorphism | 264 |
71d. | The Non-Denumerable Cardinal Numbers | 267 |
71e. | The Axiomatic Method | 271 |
Part V. | Philosophy and Syntax | |
A. | On the Form of the Sentences Belonging to the Logic of Science | |
72. | Philosophy Replaced by the Logic of Science | 277 |
73. | The Logic of Science is the Syntax of the Language of Science | 281 |
74. | Pseudo-Object-Sentences | 284 |
75. | Sentences about Meaning | 288 |
76. | Universal Words | 292 |
77. | Universal Words in the Material Mode of Speech | 297 |
78. | Confusion in Philosophy Caused by the Material Mode of Speech | 298 |
79. | Philosophical Sentences in the Material and in the Formal Mode of Speech | 302 |
80. | The Dangers of the Material Mode of Speech | 308 |
81. | The Admissibility of the Material Mode of Speech | 312 |
B. | The Logic of Science as Syntax | |
82. | The Physical Language | 315 |
83. | The so-called Foundations of the Sciences | 322 |
84. | The Problem of the Foundation of Mathematics | 325 |
85. | Syntactical Sentences in the Literature of the Special Sciences | 328 |
86. | The Logic of Science is Syntax | 331 |
| Bibliography and Index of Authors | 334 |
| Index of Subjects | 347 |