Combining Texts
Ideas for
'works', 'Absolute Necessities' and 'Naming and Necessity notes and addenda'
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14 ideas
10. Modality / A. Necessity / 2. Nature of Necessity
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15086
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Absolute necessity might be achievable either logically or metaphysically [Hale]
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10. Modality / A. Necessity / 3. Types of Necessity
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8261
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Maybe not-p is logically possible, but p is metaphysically necessary, so the latter is not absolute [Hale]
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15081
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A strong necessity entails a weaker one, but not conversely; possibilities go the other way [Hale]
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15080
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'Relative' necessity is just a logical consequence of some statements ('strong' if they are all true) [Hale]
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10. Modality / A. Necessity / 5. Metaphysical Necessity
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15082
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Metaphysical necessity says there is no possibility of falsehood [Hale]
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10. Modality / A. Necessity / 6. Logical Necessity
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15085
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'Broadly' logical necessities are derived (in a structure) entirely from the concepts [Hale]
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15088
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Logical necessities are true in virtue of the nature of all logical concepts [Hale]
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10. Modality / A. Necessity / 7. Natural Necessity
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4970
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What is often held to be mere physical necessity is actually metaphysical necessity [Kripke]
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17058
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What many people consider merely physically necessary I consider completely necessary [Kripke]
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10. Modality / B. Possibility / 1. Possibility
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17059
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Unicorns are vague, so no actual or possible creature could count as a unicorn [Kripke]
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10. Modality / C. Sources of Modality / 4. Necessity from Concepts
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15087
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Conceptual necessities are made true by all concepts [Hale]
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10. Modality / E. Possible worlds / 1. Possible Worlds / e. Against possible worlds
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4950
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Possible worlds are useful in set theory, but can be very misleading elsewhere [Kripke]
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10. Modality / E. Possible worlds / 3. Transworld Objects / b. Rigid designation
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17003
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Kaplan's 'Dthat' is a useful operator for transforming a description into a rigid designation [Kripke]
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10. Modality / E. Possible worlds / 3. Transworld Objects / c. Counterparts
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9221
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The best known objection to counterparts is Kripke's, that Humphrey doesn't care if his counterpart wins [Kripke, by Sider]
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