Combining Texts

All the ideas for 'fragments/reports', 'A Completeness Theorem in Modal Logic' and 'The Common-Sense View of Reality'

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12 ideas

1. Philosophy / E. Nature of Metaphysics / 2. Possibility of Metaphysics

20728

Metaphysics is hopeless with its present epistemology; common-sense realism is needed [Colvin]

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]

7. Existence / D. Theories of Reality / 2. Realism

20726

We can only distinguish self from non-self if there is an inflexible external reality [Colvin]

20727

Common-sense realism rests on our interests and practical life [Colvin]

7. Existence / D. Theories of Reality / 4. Anti-realism

20729

Arguments that objects are unknowable or non-existent assume the knower's existence [Colvin]

20730

If objects are doubted because their appearances change, that presupposes one object [Colvin]

20731

The idea that everything is relations is contradictory; relations are part of the concept of things [Colvin]

23. Ethics / C. Virtue Theory / 2. Elements of Virtue Theory / e. Character

541	Virtue comes more from habit than character [Critias]

28. God / C. Attitudes to God / 5. Atheism

542	Fear of the gods was invented to discourage secret sin [Critias]