Combining Philosophers
Ideas for Hilbert,D/Ackermann,W, Aristotle and Theodore Sider
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9 ideas
10. Modality / A. Necessity / 2. Nature of Necessity
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12381
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What is necessary cannot be otherwise [Aristotle]
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12611
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Necessity makes alternatives impossible [Aristotle]
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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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1690
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A stone travels upwards by a forced necessity, and downwards by natural necessity [Aristotle]
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10. Modality / A. Necessity / 4. De re / De dicto modality
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14641
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A deduction is necessary if the major (but not the minor) premise is also necessary [Aristotle]
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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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12259
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Reasoning is when some results follow necessarily from certain claims [Aristotle]
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17852
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A thing has a feature necessarily if its denial brings a contradiction [Aristotle]
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13709
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Logical truths must be necessary if anything is [Sider]
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