 Scotus argues that if Henry is right about the limitations of our natural powers, even divine illumination is not enough to save us from pervasive uncertainty. To Henry’s first argument he replies that there is no certainty to be had by knowing a mutable object as immutable. To the second he replies that anything in the soul—including the very act of understanding that Henry thinks is achieved through illumination—is mutable. So by Henry’s argument it would be impossible for anything whatever to preserve the soul from error. And to the third argument he replies that if the created exemplar is such as to preclude certainty, adding extra exemplars will not solve the problem: “When something incompatible with certainty concurs, certainty cannot be attained” (Ordinatio 1, d. 3, pars 1, q. 4, n. 221).