In this Appendix we propose a model-theoretic approach to the problems associated with proper names and change of concepts through time. We describe a possible world semantics (both modal and tense in nature), for a special time dependent language (to be explained later) that will account for a part of the puzzling phenomena involving proper names and change of concepts in natural language.
KeywordsWorld Semantic Tense Logic Puzzling Phenomenon Reidel Publishing Company Evening Star
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