Combining Texts

All the ideas for 'Symposium', 'Modal Logic within Counterfactual Logic' and 'Letters to Mersenne'

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10 ideas

1. Philosophy / G. Scientific Philosophy / 3. Scientism
3653 My Meditations are the complete foundation of my physics [Descartes]
3. Truth / A. Truth Problems / 2. Defining Truth
4736 Truth is such a transcendentally clear notion that it cannot be further defined [Descartes]
4. Formal Logic / D. Modal Logic ML / 3. Modal Logic Systems / h. System S5
14626 In S5 matters of possibility and necessity are non-contingent [Williamson]
10. Modality / A. Necessity / 1. Types of Modality
14625 Necessity is counterfactually implied by its negation; possibility does not counterfactually imply its negation [Williamson]
10. Modality / B. Possibility / 8. Conditionals / a. Conditionals
14623 Strict conditionals imply counterfactual conditionals: □(A⊃B)⊃(A□→B) [Williamson]
10. Modality / B. Possibility / 9. Counterfactuals
14624 Counterfactual conditionals transmit possibility: (A□→B)⊃(◊A⊃◊B) [Williamson]
10. Modality / C. Sources of Modality / 1. Sources of Necessity
14531 Rather than define counterfactuals using necessity, maybe necessity is a special case of counterfactuals [Williamson, by Hale/Hoffmann,A]
15. Nature of Minds / C. Capacities of Minds / 2. Imagination
14628 Imagination is important, in evaluating possibility and necessity, via counterfactuals [Williamson]
22. Metaethics / B. Value / 2. Values / h. Fine deeds
5845 Niceratus learnt the whole of Homer by heart, as a guide to goodness [Xenophon]
29. Religion / D. Religious Issues / 2. Immortality / b. Soul
3652 I can't prove the soul is indestructible, only that it is separate from the mortal body [Descartes]