Robert B. Talisse

Restating an interlocutor’s position in an incredulous tone of voice can sometimes serve legitimate dialectical ends. However, there are cases in which incredulous restatement is out of bounds. This article provides an analysis of one common instance of the inappropriate use of incredulous restatement, which the authors call “modus tonens.” The authors argue that modus tonens is vicious because it pragmatically implicates the view that one’s interlocutor is one’s cognitive subordinate and provides a cue to like-minded onlookers that dialectical opponents are not to be treated as epistemic peers.

An intuitive view regarding the epistemic significance of disagreement says that when epistemic peers disagree, they should suspend judgment. This abstemious view seems to embody a kind of detachment appropriate for rational beings; moreover, it seems to promote a kind of conciliatory inclination that makes for irenic and cooperative further discussion. Like many strategies for cooperation, however, the abstemious view creates opportunities for free-riding. In this essay, the authors argue that the believer who suspends judgment in the face of peer disagreement is vulnerable to a kind of manipulation on the part of more tenacious peers. The result is that the abstemious view can have the effect of encouraging dogmatism.