This paper adopts a pragma-dialectic approach to explore inclusion in real-world argumentation. Having outlined theories of deliberative democracy—focussing on Habermas’s discourse model—and pragma-dialectic methods for analysing argumentative exchanges in the real world, we then relate them. From this we identify the potential for using the enhanced detail of pragma-dialectic analysis to constructively understand dynamics of inclusion in the political decision processes of central concern to deliberative democratic theories.In the remainder of the article we illustrate this potential with our own pragma-dialectic (...) analysis of an instance of real-world argumentation in a political policymaking process—a deliberative forum in the contentious field of mental health. The detail afforded by the pragma-dialectic method allows us to more clearly identify the complex layers and dynamics of argument involved in these policy deliberations, allowing insights into mechanisms for inclusion in deliberations, relative to the parties to such deliberations, their roles and competing interests and perspectives.By relating the two fields of deliberative democratic theory and pragma-dialectics this article aims to develop their complementary potential—in particular by suggesting, and briefly illustrating—how pragma-dialectic methods might enhance analysis of the dynamics of argumentation in political policymaking processes, in particular as an aid to constructive reflection on those processes by theorists and participants together. (shrink)