The odour of solipsism hangs about a certain version of persuasion. Irresistible arguments are marshalled then an interlocutor is wheeled in, a person of impeccable rational propriety. The persuasive arguments do their work and conviction ensues. When this does not happen it is obvious that there is some fault in the reasoning capacity of the persuadee combined with a wilful recalcitrance. They are not a true rational Scotsman.
Let’s just argue.