Authors
Jack Woods
University of Leeds
Abstract
I argue that in order to apply the most common type of criteria for logicality, invariance criteria, to natural language, we need to consider both invariance of content—modeled by functions from contexts into extensions—and invariance of character—modeled, à la Kaplan, by functions from contexts of use into contents. Logical expressionsshould be invariant in both senses. If we do not require this, then old objections due to Timothy McCarthy and William Hanson, suitably modified, demonstrate that content invariant expressions can display intuitive marks of non-logicality. If we do require this, we neatly avoid these objections while also managing to demonstrate desirable connections of logicality to necessity. The resulting view is more adequate as a demarcation of the logical expressions of natural language.
Keywords Logicality  Kaplan  Logic of Indexicals  Invariance  Tarski
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DOI http://dx.doi.org/10.3998/ergo.12405314.0003.030
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Logical Truth.Mario Gomez-Torrente - 2014 - Stanford Encyclopedia of Philosophy.
Invariance and Logicality in Perspective.Gila Sher - forthcoming - In Gil Sagi & Jack Woods (eds.), The Semantic Conception of Logic: Essays on Consequence, Invariance, and Meaning. Cambridge, Britain: Cambridge University Press.

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