Combining Texts

Ideas for 'Counterpart theory and Quant. Modal Logic', 'Mere Possibilities' and 'On Aristotle's Metaphysics Book 2'

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2 ideas

10. Modality / A. Necessity / 3. Types of Necessity

16466

Strong necessity is always true; weak necessity is cannot be false [Stalnaker]

10. Modality / A. Necessity / 7. Natural Necessity

11978

Causal necessities hold in all worlds compatible with the laws of nature [Lewis]