Following and extending Searle’s speech act theory, both Pragma-Dialectics and the Linguistic Normative Model of Argumentation characterize argumentation as an illocutionary act. In these models, the successful performance of an illocutionary act of arguing depends on the securing of uptake, an illocutionary effect that, according to the Searlean account, characterizes the successful performance of any illocutionary act. However, in my view, there is another kind of illocutionary effect involved in the successful performance of an illocutionary act of arguing, which affects (...) both the speaker’s and the hearer’s set of rights, obligations, and entitlements. In order to give an account of this second type of effect, I will argue that it is necessary to distinguish two levels in the analysis of the illocutionary act of arguing. The first one is related to the illocutionary effect of securing of uptake and thus to the speech act performed by the speaker, while the second one allows us to account for the changes produced by the performance of the illocutionary act of arguing in the deontic modal competence of both the speaker and the hearer. (shrink)