Journal
TOPOI-AN INTERNATIONAL REVIEW OF PHILOSOPHY
Volume 40, Issue 1, Pages 87-105Publisher
SPRINGER
DOI: 10.1007/s11245-020-09704-3
Keywords
Conditional logic; Sufficient reason; Necessary reason; Difference-making; Relevance; Definable conditional; Ranking semantics; Belief revision; Completeness result
Categories
Funding
- Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) [FOR 1614]
- Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany's Excellence Strategy by the DFG Cluster of Excellence Machine Learning: New Perspectives for Science, EXC [2064/1, 390727645]
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The variably strict analysis of conditionals, originated by Stalnaker and Lewis, not only dominates the philosophical literature, but has also been applied in linguistics and psychology. Modifications have been made to address the shortcomings of the Lewis-Stalnaker account, resulting in various new forms of conditionals and conditional constructions. These new connectives can be seen as either strengthened or weakened conditionals, stemming from a basic conditional nucleus.
The variably strict analysis of conditionals does not only largely dominate the philosophical literature, since its invention by Stalnaker and Lewis, it also found its way into linguistics and psychology. Yet, the shortcomings of Lewis-Stalnaker's account initiated a plethora of modifications, such as non-vacuist conditionals, presuppositional indicatives, perfect conditionals, or other conditional constructions, for example: reason relations, difference-making conditionals, counterfactual dependency, or probabilistic relevance. Many of these new connectives can be treated as strengthened or weakened conditionals. They aredefinable conditionals. This article develops a technique to infer the logic for such definable conditionals from the known logic of the underlying defining conditional. The technique is applied to central examples. The results show that a large part of the zoo of conditionals arises from a basic conditional-a constant nucleus of the different contextual and conceptual variations of variably strict conditionals.
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