Contemporary theory of argumentation offers many insights about the ways in which, in the context of a public controversy, arguers should ideally present their arguments and criticize those of their opponents. We also know that in practice not all works out according to the ideal patterns: numerous kinds of derailments (fallacies) are an object of study for argumentation theorists. But how about the use of unfair strategies vis-à-vis one’s opponents? What if it is not a matter of occasional derailments but of one party’s systematic refusal to take other parties seriously? What if one party continually forgoes any form of critical testing and instead resorts to threats or blackmail? Can this be countered by the tools of reason? Or should one...