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Aim of the paper is to make some steps towards a formal characterization of identity criteria. First of all, we analyse some logical requirements identity criteria are supposed to satisfy and observe that some commonly used identity criteria fail to meet some of them. We focus in particular on the equivalence requirement. We consider then the proposals which have been given so far and aimed at providing logical adequacy to non-equivalent identity conditions. To this purpose, we analyse Williamson’s and De Clerq and Horsten’s treatment of identity criteria. We expand their formal framework, characterizing identity conditions in terms of contexts and levels of granularity too.

DOI: 10.4000/estetica.1703

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