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Ideas for 'Axiomatic Theories of Truth (2005 ver)', 'The Philosophy of Logical Atomism' and 'Mere Possibilities'

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2 ideas

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

6099	Modal terms are properties of propositional functions, not of propositions [Russell]

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

16466

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