Combining Texts

All the ideas for 'works', 'Relations' and 'A Completeness Theorem in Modal Logic'

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8 ideas

4. Formal Logic / D. Modal Logic ML / 1. Modal Logic

10163

Propositional modal logic has been proved to be complete [Kripke, by Feferman/Feferman]

4. Formal Logic / D. Modal Logic ML / 3. Modal Logic Systems / a. Systems of modal logic

10760

With possible worlds, S4 and S5 are sound and complete, but S1-S3 are not even sound [Kripke, by Rossberg]

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

16189

The variable domain approach to quantified modal logic invalidates the Barcan Formula [Kripke, by Simchen]

15132

The Barcan formulas fail in models with varying domains [Kripke, by Williamson]

8. Modes of Existence / A. Relations / 1. Nature of Relations

21354

It may be that internal relations like proportion exist, because we directly perceive it [MacBride]

8. Modes of Existence / A. Relations / 2. Internal Relations

21353

Internal relations are fixed by existences, or characters, or supervenience on characters [MacBride]

8. Modes of Existence / A. Relations / 4. Formal Relations / a. Types of relation

21352

'Multigrade' relations are those lacking a fixed number of relata [MacBride]

13. Knowledge Criteria / B. Internal Justification / 3. Evidentialism / b. Evidentialism

6587	It is always wrong to believe things on insufficient evidence [Clifford]