Inquiry : An Interdisciplinary Journal of Philosophy 16 (1-4):280 – 289 (1973)
The intuitive notion behind the usual semantics of most systems of modal logic is that of ?possible worlds?. Loosely speaking, an expression is necessary if and only if it holds in all possible worlds; it is possible if and only if it holds in some possible world. Of course, contradictory expressions turn out to hold in no possible worlds, and logically true expressions turn out to hold in every possible world. A method is presented for transforming standard modal systems into systems of modal logic for impossible worlds. To each possible world there corresponds an impossible world such that an expression holds in the impossible world if and only if it does not hold in the possible world. One can then talk about such worlds quite consistently, and there seems to be no logical reason for excluding them from consideration
|Keywords||No keywords specified (fix it)|
|Categories||categorize this paper)|
References found in this work BETA
Completeness and Decidability of Three Logics of Counterfactual Conditionals.David Lewis - 1971 - Theoria 37 (1):74-85.
Sentential Calculus for Logical Falsehoods.Charles G. Morgan - 1973 - Notre Dame Journal of Formal Logic 14 (3):347-353.
Citations of this work BETA
No citations found.
Similar books and articles
Impossible Worlds and Propositions: Against the Parity Thesis.Francesco Berto - 2010 - Philosophical Quarterly 60 (240):471-486.
Weak Liberated Versions of T and S.Charles G. Morgan - 1975 - Journal of Symbolic Logic 40 (1):25-30.
Quantified Modal Logic: Non-Normal Worlds and Propositional Attitudes.Veikko Rantala - 1982 - Studia Logica 41 (1):41 - 65.
Possible-Worlds Semantics for Modal Notions Conceived as Predicates.Volker Halbach, Hannes Leitgeb & Philip Welch - 2003 - Journal of Philosophical Logic 32 (2):179-223.
Lycan on Lewis and Meinong.Peter J. King - 1992 - Proceedings of the Aristotelian Society 93:193 - 201.
Impossible Worlds and Logical Omniscience: An Impossibility Result.Jens Christian Bjerring - 2013 - Synthese 190 (13):2505-2524.
Added to index2009-02-04
Total downloads47 ( #110,803 of 2,169,121 )
Recent downloads (6 months)2 ( #186,290 of 2,169,121 )
How can I increase my downloads?