Combining Texts

All the ideas for '67: Platonic Questions', 'Letters to Foucher' and 'works'

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5 ideas

4. Formal Logic / D. Modal Logic ML / 3. Modal Logic Systems / h. System S5

7791	The simplest of the logics based on possible worlds is Lewis's S5 [Lewis,CI, by Girle]

8. Modes of Existence / C. Powers and Dispositions / 4. Powers as Essence

13095

Essence is primitive force, or a law of change [Leibniz]

10. Modality / A. Necessity / 2. Nature of Necessity

11002

Equating necessity with informal provability is the S4 conception of necessity [Lewis,CI, by Read]

15. Nature of Minds / A. Nature of Mind / 2. Psuche

5960	When the soul is intelligent and harmonious, it is part of god and derives from god [Plutarch]

26. Natural Theory / C. Causation / 9. General Causation / d. Causal necessity

2117	The connection in events enables us to successfully predict the future, so there must be a constant cause [Leibniz]