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2013
|
tom 20
|
nr 3
283 – 301
EN
The aim of the paper is to discuss the ersatz theory of Lewis’s impossible worlds, point out its undeniable benefits and demonstrate its costs. Firstly, the author presents two approaches to Lewis’s impossible worlds taken as constructions out of possibilia. Secondly, he evaluates the proposals using the Lewisian criteria of success concerning the well-defined conception of analysis. Although appealing, he does not find the proposals fully persuasive. Thirdly, the author discusses the objection from an ad hoc distinction between possible and impossible worlds. He concludes that the objection does not present a special problem for the Lewisian theory. Finally, he motivates a theory of extended modal realism, to wit, modal realism enriched with concrete impossibilia.
EN
The subject of this paper is the notion of similarity between the actual and impossible worlds. Many believe that this notion is governed by two rules. According to the first rule, every non-trivial world is more similar to the actual world than the trivial world is. The second rule states that every possible world is more similar to the actual world than any impossible world is. The aim of this paper is to challenge both of these rules. We argue that acceptance of the first rule leads to the claim that the rule ex contradictione sequitur quodlibet is invalid in classical logic. The second rule does not recognize the fact that objects might be similar to one another due to various features.
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