Truth and the Functions of Political Discourse: Concluding Reflections

This chapter reflects on some of the major themes of this volume, as it takes up the question: is truth a value in political discourse? As a preliminary step, we evaluate a view of political discourse that answers this question negatively: the identity-expression view. According to this view, political claims function to express commitments central to an individual’s political self-conceptions, rather than to state truths in the political domain. While we often assess political claims as true or false, the identity-expression view maintains that such assessments are nothing more than our way of affirming or rejecting such claims—assessments of truth in politics are themselves only ways of expressing the political identity of the assessor. We explore the implications of the identity-expression view for the analysis of political disagreement and argue that, while some political disagreements may be best modeled this way, it is not clear that all of them are: at least sometimes, political disagreements are clearly responsive to the exchange of truth-apt reasons. Indeed, the structure of political disagreements (and some cases of polarization) suggest that truth continues to play an important aspirational role in many political exchanges. This leads us to embrace a pluralist picture of the function of political discourse: political discourse performs multiple functions, including reaching political decisions based on a public exchange of truth-apt reasons, and motivating political action via expressions of identity-forming political commitments. We also draw some broader implications of this pluralist position about the function of political discourse for theories of truth. This includes deflationist approaches to truth making a good fit for expressive uses of political claims in disagreement in attitude, whereas substantive theories of truth appear better suited to explain factual political disagreements.