Combining Texts
Ideas for
'Parmenides', 'Logic for Philosophy' and 'The Philosophy of Nature: new essentialism'
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12 ideas
10. Modality / A. Necessity / 3. Types of Necessity
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13721
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'Strong' necessity in all possible worlds; 'weak' necessity in the worlds where the relevant objects exist [Sider]
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10. Modality / A. Necessity / 5. Metaphysical Necessity
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13707
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Maybe metaphysical accessibility is intransitive, if a world in which I am a frog is impossible [Sider]
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10. Modality / A. Necessity / 6. Logical Necessity
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13709
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Logical truths must be necessary if anything is [Sider]
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10. Modality / B. Possibility / 1. Possibility
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5479
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Scientific essentialists say science should define the limits of the possible [Ellis]
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10. Modality / B. Possibility / 8. Conditionals / b. Types of conditional
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13716
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'If B hadn't shot L someone else would have' if false; 'If B didn't shoot L, someone else did' is true [Sider]
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10. Modality / C. Sources of Modality / 5. Modality from Actuality
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5483
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Essentialists deny possible worlds, and say possibilities are what is compatible with the actual world [Ellis]
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10. Modality / C. Sources of Modality / 6. Necessity from Essence
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5447
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Metaphysical necessities are true in virtue of the essences of things [Ellis]
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10. Modality / D. Knowledge of Modality / 3. A Posteriori Necessary
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5476
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Essentialists say natural laws are in a new category: necessary a posteriori [Ellis]
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10. Modality / D. Knowledge of Modality / 4. Conceivable as Possible / a. Conceivable as possible
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5478
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Imagination tests what is possible for all we know, not true possibility [Ellis]
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10. Modality / E. Possible worlds / 1. Possible Worlds / c. Possible worlds realism
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5482
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Possible worlds realism is only needed to give truth conditions for modals and conditionals [Ellis]
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10. Modality / E. Possible worlds / 3. Transworld Objects / a. Transworld identity
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13717
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Transworld identity is not a problem in de dicto sentences, which needn't identify an individual [Sider]
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10. Modality / E. Possible worlds / 3. Transworld Objects / e. Possible Objects
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13719
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Barcan Formula problem: there might have been a ghost, despite nothing existing which could be a ghost [Sider]
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