Combining Texts
Ideas for
'Metaphysics', 'Are Freedom and Equality Compatible?' and 'Naming and Necessity notes and addenda'
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16 ideas
10. Modality / A. Necessity / 2. Nature of Necessity
12611
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Necessity makes alternatives impossible [Aristotle]
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10. Modality / A. Necessity / 6. Logical Necessity
17852
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A thing has a feature necessarily if its denial brings a contradiction [Aristotle]
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10. Modality / A. Necessity / 7. Natural Necessity
17058
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What many people consider merely physically necessary I consider completely necessary [Kripke]
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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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10. Modality / B. Possibility / 1. Possibility
15779
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Possibility is when the necessity of the contrary is false [Aristotle]
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15769
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Anything which is possible either exists or will come into existence [Aristotle]
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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 / B. Possibility / 4. Potentiality
14544
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Potentialities are always for action, but are conditional on circumstances [Aristotle]
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15774
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We recognise potentiality from actuality [Aristotle]
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15777
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A 'potentiality' is a principle of change or process in a thing [Aristotle]
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15778
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Things are destroyed not by their powers, but by their lack of them [Aristotle]
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10. Modality / C. Sources of Modality / 6. Necessity from Essence
12612
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Some things have external causes of their necessity; others (the simple) generate necessities [Aristotle]
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15108
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Aristotle's says necessary truths are distinct and derive from essential truths [Aristotle, by Koslicki]
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10. Modality / E. Possible worlds / 1. Possible Worlds / e. Against possible worlds
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
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
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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