Combining Texts
Ideas for
'Mathematical Methods in Philosophy', 'Ethical Studies' and 'The Boundary Stones of Thought'
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10 ideas
10. Modality / A. Necessity / 5. Metaphysical Necessity
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18816
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Metaphysical modalities respect the actual identities of things [Rumfitt]
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10. Modality / A. Necessity / 6. Logical Necessity
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18825
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S5 is the logic of logical necessity [Rumfitt]
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10. Modality / B. Possibility / 1. Possibility
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18824
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Since possibilities are properties of the world, calling 'red' the determination of a determinable seems right [Rumfitt]
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18828
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If two possibilities can't share a determiner, they are incompatible [Rumfitt]
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10. Modality / E. Possible worlds / 1. Possible Worlds / a. Possible worlds
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18745
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A Tarskian model can be seen as a possible state of affairs [Horsten/Pettigrew]
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18747
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The 'spheres model' was added to possible worlds, to cope with counterfactuals [Horsten/Pettigrew]
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10. Modality / E. Possible worlds / 1. Possible Worlds / b. Impossible worlds
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18748
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Epistemic logic introduced impossible worlds [Horsten/Pettigrew]
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10. Modality / E. Possible worlds / 1. Possible Worlds / e. Against possible worlds
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18746
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Possible worlds models contain sets of possible worlds; this is a large metaphysical commitment [Horsten/Pettigrew]
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18750
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Using possible worlds for knowledge and morality may be a step too far [Horsten/Pettigrew]
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18821
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Possibilities are like possible worlds, but not fully determinate or complete [Rumfitt]
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