Combining Texts

All the ideas for 'Content Preservation', 'Letters to Russell' and 'The Barcan Formula and Metaphysics'

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8 ideas

1. Philosophy / D. Nature of Philosophy / 3. Philosophy Defined

7085	The main problem of philosophy is what can and cannot be thought and expressed [Wittgenstein, by Grayling]

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

16186

The Barcan Formulas express how to combine modal operators with classical quantifiers [Simchen]

16187

The Barcan Formulas are orthodox, but clash with the attractive Actualist view [Simchen]

16190

BF implies that if W possibly had a child, then something is possibly W's child [Simchen]

7. Existence / C. Structure of Existence / 6. Fundamentals / d. Logical atoms

23463

Atomic facts correspond to true elementary propositions [Wittgenstein]

10. Modality / E. Possible worlds / 1. Possible Worlds / d. Possible worlds actualism

16188

Serious Actualism says there are no facts at all about something which doesn't exist [Simchen]

13. Knowledge Criteria / C. External Justification / 1. External Justification

9382	Subjects may be unaware of their epistemic 'entitlements', unlike their 'justifications' [Burge]

19. Language / D. Propositions / 4. Mental Propositions

23490

A thought is mental constituents that relate to reality as words do [Wittgenstein]