This chapter discusses how argumentation can be viewed as a dialogical process, where reasons are constructed, examined, and weighed through interactions among discussants, experts, and judges. It highlights the significance of presuppositions in shaping the orientation of arguments and the conclusions drawn from them. By analyzing a contemporary opinion piece, the chapter illustrates how logical evaluation is not merely retrospective but is integral to the ongoing process of argumentation. The chapter ultimately argues for a nuanced understanding of logical evaluation that encompasses both internal and external perspectives, contributing to a richer comprehension of argumentative discourse.