Combining Texts
Ideas for
'Mathematical Methods in Philosophy', 'Assertion' and 'System of Logic'
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7 ideas
10. Modality / A. Necessity / 2. Nature of Necessity
12190
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Necessity is what will be, despite any alternative suppositions whatever [Mill]
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22623
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Necessity can only mean what must be, without conditions of any kind [Mill]
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10. Modality / E. Possible worlds / 1. Possible Worlds / a. Possible worlds
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
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
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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