Abstract
The problem of formulating an adequate criterion of identity for propositions and other intensionalia was at one time considered the principle obstacle to the construction of an acceptable general intensional logic. The objection was urged time and again, principally by W. V. Quine, and still has its influence.1 Alonzo Church responded directly to the challenge and attempted to incorporate various criteria of identity into fully formalized intensional logics, different implementations of his logic of sense and denotation. The logistic system which was to be based on the most important of Church’s ideas, synonymous isomorphism, remains unfinished.
In this paper I attempt to clarify the point and nature of demands for criteria of identity and to evaluate various objections against Church’s criterion. My conclusion is that a modification suggested by certain alleged counterexamples appears to fit the data better and so merits further study. Important parts of the overall project require the development of a detailed logistic treatment meeting current standards of rigor. This will not be attempted here, but is reserved for a technical sequel.
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Anderson, C.A. (2001). Alternative (1*): A Criterion of Identity for Intensional Entities. In: Anderson, C.A., Zelëny, M. (eds) Logic, Meaning and Computation. Synthese Library, vol 305. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-0526-5_19
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