Combining Texts

All the ideas for 'Deflationary Metaontology of Thomasson', 'Letters to Russell' and 'works'

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10 ideas

1. Philosophy / D. Nature of Philosophy / 3. Philosophy Defined

7085	The main problem of philosophy is what can and cannot be thought and expressed [Wittgenstein, by Grayling]

5. Theory of Logic / A. Overview of Logic / 2. History of Logic

11022

Gentzen introduced a natural deduction calculus (NK) in 1934 [Gentzen, by Read]

5. Theory of Logic / E. Structures of Logic / 2. Logical Connectives / a. Logical connectives

11065

The inferential role of a logical constant constitutes its meaning [Gentzen, by Hanna]

11023

The logical connectives are 'defined' by their introduction rules [Gentzen]

11213

Each logical symbol has an 'introduction' rule to define it, and hence an 'elimination' rule [Gentzen]

6. Mathematics / B. Foundations for Mathematics / 4. Axioms for Number / g. Incompleteness of Arithmetic

10067

Gentzen proved the consistency of arithmetic from assumptions beyond arithmetic [Gentzen, by Musgrave]

7. Existence / C. Structure of Existence / 6. Fundamentals / d. Logical atoms

23463

Atomic facts correspond to true elementary propositions [Wittgenstein]

9. Objects / A. Existence of Objects / 5. Individuation / e. Individuation by kind

14082

No sortal could ever exactly pin down which set of particles count as this 'cup' [Schaffer,J]

9. Objects / F. Identity among Objects / 6. Identity between Objects

14081

Identities can be true despite indeterminate reference, if true under all interpretations [Schaffer,J]

19. Language / D. Propositions / 4. Mental Propositions

23490

A thought is mental constituents that relate to reality as words do [Wittgenstein]