 Bondy argues that an underestimated testifier loses at least some capacity for critical engagement with other people. This capacity might progressively deteriorate, or the person might internalize its diminished form. Underestimating a testifier undermines the rationality of arguing processes with the result that the audience tends to lose potentially valuable information and insight. On the other hand, an overestimated testifier also can fail to gain valuable information from others, derailing the argumentative exchange by preventing the success of the better line of reasoning. After the particular discussion, the overestimated person can come to be viewed as beyond scrutiny, thus losing (at least on occasion) the benefits of engaging in discursive argumentation. By contrast, Fricker’s original conception of testimonial injustice accounts for the harmful effects on knowers only when their testimony is underestimated, and she argues that epistemic injustice does not accrue from overestimating credibility.