The word ‘persuasion’ can be used in two different ways. It can either implicate a process of changing someone’s belief or action without any argumentative justification or, to the contrary, indicate that the changes are indeed a result of argumentative discourse. These two different uses are part of a conceptual development in the history of philosophy. Nowadays they are often placed in contrast to each other, whereby persuasion in philosophy as a non-argumentative act is taken as doubtful and even unsound. In the following paper I argue that the two types of processes should not be conceived of as incompatible, taking some notes from Wittgenstein’s On Certainty as an argumentative source. I will show that persuading as a rational practice...