 Importantly, if doubt is thus unbounded there is no circularity. For, on this reading of Arc 1, the arguments therein do not presuppose the general veracity of the C&amp;D Rule. The premises contributing to the conclusion of an all-perfect God remain vulnerable to hyperbolic doubt. Throughout this stage of the inquiry, none of the meditator’s judgments based in clear and distinct perception constitutes perfect knowledge. It is the unboundedness of hyperbolic doubt that underwrites the No Atheistic Perfect Knowledge Thesis.