Pragma-Dialectics’ comprehensiveness is first expressed in seeing argumentation as fundamentally dialectical. Argumentation basically arises in an exchange between the proponent of some claim and a challenger who openly doubts that claim. The resulting critical discussion to resolve this difference of opinion constitutes argument in its primary sense. Argumentation then basically falls under the province of dialectics. However, since the interlocutors’ contributions can have persuasive effects, rhetoric is not denied its province of study on the pragma-dialectical view. Likewise, the proponent’s contributions can be recast in the form of an argument as product, subject to logical evaluation.1