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'works', 'On the Plurality of Worlds' and 'Maths as a Science of Patterns'
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22 ideas
10. Modality / E. Possible worlds / 1. Possible Worlds / a. Possible worlds
9669
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There are no free-floating possibilia; they have mates in a world, giving them extrinsic properties [Lewis]
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10. Modality / E. Possible worlds / 1. Possible Worlds / b. Impossible worlds
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Possible worlds can contain contradictions if such worlds are seen as fictions [Lewis]
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16132
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On mountains or in worlds, reporting contradictions is contradictory, so no such truths can be reported [Lewis]
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10. Modality / E. Possible worlds / 1. Possible Worlds / c. Possible worlds realism
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For me, all worlds are equal, with each being actual relative to itself [Lewis]
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For Lewis there is no real possibility, since all possibilities are actual [Oderberg on Lewis]
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9219
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Lewis posits possible worlds just as Quine says that physics needs numbers and sets [Lewis, by Sider]
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If possible worlds really exist, then they are part of actuality [Sider on Lewis]
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10469
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A world is a maximal mereological sum of spatiotemporally interrelated things [Lewis]
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10. Modality / E. Possible worlds / 1. Possible Worlds / d. Possible worlds actualism
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Lewis rejects actualism because he identifies properties with sets [Lewis, by Stalnaker]
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16282
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Ersatzers say we have one world, and abstract representations of how it might have been [Lewis]
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10. Modality / E. Possible worlds / 2. Nature of Possible Worlds / a. Nature of possible worlds
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Ersatz worlds represent either through language, or by models, or magically [Lewis]
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10. Modality / E. Possible worlds / 2. Nature of Possible Worlds / b. Worlds as fictions
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Linguistic possible worlds need a complete supply of unique names for each thing [Lewis]
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16287
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Maximal consistency for a world seems a modal distinction, concerning what could be true together [Lewis]
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9662
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Linguistic possible worlds have problems of inconsistencies, no indiscernibles, and vocabulary [Lewis]
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10. Modality / E. Possible worlds / 2. Nature of Possible Worlds / c. Worlds as propositions
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If sets exist, then defining worlds as proposition sets implies an odd distinction between existing and actual [Jacquette on Lewis]
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10. Modality / E. Possible worlds / 3. Transworld Objects / c. Counterparts
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The counterpart relation is sortal-relative, so objects need not be a certain way [Lewis, by Merricks]
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5440
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A counterpart in a possible world is sufficiently similar, and more similar than anything else [Lewis, by Mautner]
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5441
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Why should statements about what my 'counterpart' could have done interest me? [Mautner on Lewis]
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16291
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In counterpart theory 'Humphrey' doesn't name one being, but a mereological sum of many beings [Lewis]
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10. Modality / E. Possible worlds / 3. Transworld Objects / d. Haecceitism
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Extreme haecceitists could say I might have been a poached egg, but it is too remote to consider [Lewis, by Mackie,P]
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15129
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Haecceitism implies de re differences but qualitative identity [Lewis]
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9670
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Extreme haecceitism says you might possibly be a poached egg [Lewis]
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