 The broader case to overcome radical doubt is not yet complete. The meditator is now in position to reproduce a demonstration – each step of which he clearly and distinctly perceives – supporting the grand conclusion that he’s the creation of an all-perfect God who would not allow him to be mistaken about whatever he perceives clearly and distinctly. However, when he’s no longer clearly and distinctly perceiving the steps of the demonstration, the grand conclusion is vulnerable to the lingering Evil Genius Doubt. It seems that perfect knowledge is not yet within his grasp. Moreover, the demonstration itself looks suspiciously circular – the so-called Cartesian Circle (a problem to which we now turn).