Combining Texts

All the ideas for 'The Birth of Tragedy', 'Essential vs Accidental Properties' and 'A Completeness Theorem in Modal Logic'

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11 ideas

1. Philosophy / D. Nature of Philosophy / 1. Philosophy

7848	Philosophy begins in the horror and absurdity of existence [Nietzsche, by Ansell Pearson]

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]

9. Objects / C. Structure of Objects / 2. Hylomorphism / a. Hylomorphism

10938

The extremes of essentialism are that all properties are essential, or only very trivial ones [Rami]

9. Objects / D. Essence of Objects / 3. Individual Essences

10940

An 'individual essence' is possessed uniquely by a particular object [Rami]

9. Objects / D. Essence of Objects / 5. Essence as Kind

10939

'Sortal essentialism' says being a particular kind is what is essential [Rami]

9. Objects / D. Essence of Objects / 7. Essence and Necessity / b. Essence not necessities

10934

Unlosable properties are not the same as essential properties [Rami]

10. Modality / A. Necessity / 3. Types of Necessity

10933

Physical possibility is part of metaphysical possibility which is part of logical possibility [Rami]

10. Modality / B. Possibility / 2. Epistemic possibility

10932

If it is possible 'for all I know' then it is 'epistemically possible' [Rami]