 There are a number of ways that Cavendish might maneuver here. One would be to defend the thesis that although our natural (and hence material) minds can form no conception of an immaterial, there is another aspect of our minds — an aspect that is not material — and it can form conceptions of immaterials. Cavendish hints at this thesis when she states that natural reason cannot have an idea of an incorporeal being, leaving open that non-natural reason could have an idea of an incorporeal being. A problem of course is that Cavendish does not seem to be able to allow that natural reason can have an idea of non-natural reason or that it can put forward the thesis that non-natural reason can form conceptions of immaterials.