Abstract

In this article I offer an explanation of the need for contingent propositions in language. I argue that contingent propositions are required if and only if there is a need for propositions which can be both true and false in different circumstances. Indexical expressions enable the same proposition to be expressed in different contexts, thus allowing it to be both true and false. Examination of the different indexical expressions shows that temporal indexical expressions are the ones that do this. Furthermore, describing the change in the temporal A-determinations of past, present, or future, requires using contingent propositions. The conclusion of this article is that change in the temporal A-determinations is the explanation for the need for contingent propositions in language.