Combining Texts

All the ideas for 'Deflationary Metaontology of Thomasson', 'Intro to 2nd ed of Principia Mathematica' and 'Elements of Mathematical Logic'

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4 ideas

4. Formal Logic / E. Nonclassical Logics / 3. Many-Valued Logic

8942	Lukasiewicz's L3 logic has three truth-values, T, F and I (for 'indeterminate') [Lukasiewicz, by Fisher]

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

21681

Given all true atomic propositions, in theory every other truth can thereby be deduced [Russell]

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]