P1) If one cannot unpack what evidence would lead them to change their doxastic attitude on a proposition, then one does does not know why they believe that a proposition is true.
(∀x∀y(¬Uxy→¬Kxy))
P2) If one does not know why they believe that a proposition is true, then one should temporarily withhold the belief that a proposition is true.
(∀x∀y(¬Kxy→Wxy))
P3) The interlocutor cannot unpack what evidence would lead them to change their doxastic attitude on the proposition at hand.
(¬Uor)
C) Therefore, the interlocutor should temporarily withhold the belief that the proposition at hand is true.
(∴Wor)