This paper argues that the critique of depoliticization in Mouffe’s agonistic political theory needs to be revised. This is because her account of the political does not succeed in filtering out undesirable forms of politicization such as science denialism and other types of post-truth politics. Mouffe's conception of the common symbolic space does not accomplish the task of limiting extreme pluralism in the absence of certain standards about how to correctly apply the fundamental notions of this space. By drawing on (...) a quasi-Wittgensteinian reading of linguistic normativity, I develop principled but non-universalist limits on politicization that are needed for a healthy, well-functioning democracy. (shrink)