Date of Award


Degree Type


Degree Name

Master of Arts (MA)



First Advisor

Tim O'Keefe - Chair

Second Advisor

Stephen Jacobson

Third Advisor

Sebastian Rand


The production of equipollence is the most important part of the Pyrrhonian skeptic’s method for bringing about the suspension of judgment. The skeptic produces equipollence methodically, by opposing arguments, propositions, or appearances, in anyway whatsoever, until he produces an equality of “weightiness” on both sides of the conflicting views. Having no appropriate criterion to break the deadlock of equipollence, the skeptic (or his interlocutor) is left with no reason to accept either view. I have two main aims in this paper. My first aim is to distinguish between two different types of equipollence; that produced in the Pyrrhonist, called Psychological Equipollence, and that demonstrated to the dogmatist by the Pyrrhonist, called Normative Equipollence. My second aim in this paper is to argue that equipollence cannot be produced when the skeptic uses only epistemic possibility of error to oppose some compelling p.

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