Abstract
When someone presents an argument on a charged topic and it is alleged that the arguer has a strong personal interest and investment in the conclusion, the allegation, directed to the reception or evaluation of the argument, typically gives rise to two seemingly conflicting reactions:I. The allegation is an unwarranted diversion. The prejudices or biases of the arguer are irrelevant to the cogency of the argument. In particular, it is a distraction from the crucial judgment of whether the argument is cogent to press the question of whether the arguer truly holds his conclusion on the grounds that he offers, or whether he believes it on some illicit or suspect basis.