 Dynamic semantics is, to a first approximation, an approach to semantics which reverses these explanatory priorities. (The sorts of classical theories sketched above are, by contrast, called “static” semantic theories.) On a dynamic approach, a semantic theory does not aim primarily to deliver a pairing of sentences with propositions which then determine the sentence’s truth conditions. Rather, according to these dynamic approaches to semantics, the semantic values of sentences are rather “context change potentials”—roughly, instructions for updating the context, or discourse.