 Although it is broadly speaking true that the changes brought about by meanings in dynamic semantics concern aspects of context, it is important to note that semanticists may mean various things when they talk about context (compare the entries on  epistemic contextualism  and  indexicals),  and these different views engender varieties of dynamic semantics that deal with a variety of issues. Some of these issues are: constructing an appropriate mechanism for pronominal reference (compare the entries on  anaphora  and  reference),  explaining the semantics of conditionals (compare the entries on  conditionals  and  the logic of conditionals),  giving a semantic treatment of the distinction between assertion and presupposition (compare the entries on  assertion,  speech acts,  implicature,  pragmatics) and developing a theory of “presupposition projection”, explaining how the interpretation of discourse is influenced and guided by the common ground that exists between speaker and hearer, and developing a theory of how this common ground develops as the discourse proceeds (compare the entries on  pragmatics  and  implicature).