 The passage makes clear that the cogito is revealed by the natural light. On the interpretation at issue, Descartes’ point is that such matters admit of a privileged sort of doubt-resistance, whereby they “cannot in any way be open to doubt.” On this understanding, the scope of Evil Genius Doubt is bounded, in that not all propositions are vulnerable to the doubt. This is to say that some propositions, including the cogito, may be fully indubitable, thus satisfying the requirements of perfect knowledge – even for atheists.