Abstract

This is Part I of a two-part essay introducing case-intensional ﬁrst-order logic (CIFOL), an easy-to-use, uniform, powerful, and useful combination of ﬁrst order logic with modal logic resulting from philosophical and technical modiﬁcations of Bressan’s General interpreted modal calculus (Yale University Press 1972). CIFOL starts with a set of cases;
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