Categorial systematics

<jats:p> In this response article, I focus on two issues. First, I discuss the problem, raised by the commentators, of ‘categorial ambiguity’ in membership categorization analysis, and make suggestions about how to approach it. Second, I argue that, as conversation analysts have demonstrated the ‘systematics’ of interactional practices, membership categorization analysis should also begin to build a robust corpus of studies of ‘categorial systematics’. </jats:p>