 Though bounded and unbounded doubt interpretations both avoid vicious circularity, each confronts further difficulties, both textual and philosophical. Avoiding the charge of vicious circularity marks the beginning of the interpreter’s work, not the end. Bounded doubt interpreters must explain why, in the first place, the Evil Genius Doubt’s potency does not extend to propositions in the special class. Unbounded doubt interpreters must explain why, in the final analysis, the Evil Genius Doubt eventually loses it undermining potency. Let’s consider each of these further problems.