Combining Texts

All the ideas for 'Elements of Mathematical Logic', 'works' and 'Laudatio: Prof Ruth Barcan Marcus'

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3 ideas

4. Formal Logic / D. Modal Logic ML / 7. Barcan Formula

15130

If a property is possible, there is something which can have it [Williamson]

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]

9. Objects / B. Unity of Objects / 2. Substance / b. Need for substance

10710

We accept substance, to avoid infinite backwards chains of meaning [Wittgenstein, by Potter]