Combining Texts

All the ideas for 'Works of Love', 'On the Basis of Morality' 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]

22. Metaethics / A. Ethics Foundations / 2. Source of Ethics / b. Rational ethics

21375

Reason can be vicious, and great crimes have to be rational [Schopenhauer]

22. Metaethics / A. Ethics Foundations / 2. Source of Ethics / e. Human nature

21379

Man's three basic ethical incentives are egoism, malice and compassion [Schopenhauer]

22. Metaethics / B. Value / 2. Values / g. Love

15998

Perfect love is not in spite of imperfections; the imperfections must be loved as well [Kierkegaard]

25. Social Practice / F. Life Issues / 6. Animal Rights

21376

Philosophy treats animals as exploitable things, ignoring the significance of their lives [Schopenhauer]