Questions tagged [david-lewis]

David Lewis (1941–2001) was an important 20th century analytic philosopher who worked in many areas of philosophy, especially in metaphysics.

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Cardinality of the logical space according to David Lewis

I just read an extract of David Lewis's Counterfactuals and he claims there in a footnote on page 90 that there are at least beth_2 possible worlds. He also claims in the very same footnote that "...
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Lewis argument to defend modal realism

In the fourth chapter of "Counterfactuals", David Lewis tries to justify his positions about modal realism. He claims that: "We might take them [modalities] as metalinguistic predicates ...
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Lewis's truth condition for counterfactuals

According to SEP, Lewis's theory of counterfactual conditionals defines truth for counterfactuals as follows: [...] the truth condition for the counterfactual “If A were (or had been) the case, C ...
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Lewis's Counterfactual theory of conditionals

I'm starting to read Lewis' theory of counterfactuals. In his 1973 book, he specifies on page 10-11: "The left-hand counterfactuls make trounle for the theory that the counterfactual is a strict ...
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"Where" does the counterpart relation subsist?

AFAIK, according to the counterpart theory, it is true of me that I could have lived a different life, if my counterpart in another possible world did live a different life. But where is it true that ...
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Best order to read David Lewis

I have read some papers by Lewis but never one of his full length books... I thought that I might do so. I am undecided whether to read Counterfactuals or On the plurality of worlds and wondered if ...
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Does denying the Limit Assumption in counterfactual logic lead to contradiction?

According to the similarity semantics for counterfactuals, a counterfactual A > C is true iff on the most similar class of worlds to the actual world (or any given world the counterfactual's truth ...
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How disjunction works with the conditional excluded middle

I'm studying the semantics for counterfactuals, and I'm slightly confused about how certain inferences supposedly make the Conditional Excluded Middle (CXM) fail. Formally, we can write the ...
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David Lewis and naturalism

I am studying Lewis and I am wondering what are the cornerstones of his philosophical perspective. In particular, I am wondering if Lewis is a naturalist like his supervisor Quine.
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David Lewis and probability

I have read a general overview on David Lewis in order to have an idea of his philosophical perspective and in particular about humean supervenience. I am wondering how Lewis considers probability in ...
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The mereological account of sets

So it has come to my attention that David Lewis, David M. Armstrong and others tried a mereological account of sets. James Franklin states it as: Armstrong adopts David Lewis’s proposal that a ...
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How does the concept of the 'virtual' (Deleuze) relate to 'counterfactuals' (Lewis)?

We read: "[...] Deleuze will reject the notion of the possible in favor of that of the virtual. Rather than awaiting realization, the virtual is fully real; what happens in genesis is that the ...
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In possible-world semantics, what do nested modal quantifiers mean?

I'm trying to learn modal logic and I'm having trouble translating sentences like [][]A and []<>A into natural language using possible-world semantics. The first statement seems to read, "In ...
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What logical fallacies exist in David Lewis and Stephanie Lewis' article called "holes"?

In David & Stephanie Lewis' Article "Holes" the nominalist/realist debate gets taken to a phenomena that all of us are likely directly aware of at one point in our lives. Holes. The absent ...
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Time of Occurrence of Events

I'm wrestling with the notion of events in indeterministic worlds. Suppose that given an event type and a world we can in principle tell if the event occurs in that world. (Indeed we could represent ...
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What's the difference between being spatiotemporally isolated and causally isolated?

In this Wikipedia article on modal realism, section "Main tenets of modal realism", there's a list of six tenets. Here are the fifth and the sixth of them: 5.Possible worlds are unified by ...
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For the modal realist, do possible individuals (and worlds) exist necessarily?

For David Lewis's Modal Realism, do the worlds and individuals that inhabit them exist necessarily? In a sense, the answer is "no". For an individual to exist necessarily would be for it to have a ...
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Is the mathematical notion of a "standard model" a metaphysical or a (purely) epistemic distinction?

When doing mathematics and providing models that satisfy a given theory, we differentiate between standard and non-standard models. Now, assume you are a platonist and believe that the objects ...
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