Within the limitations which I have set for myself ‒ namely, those of a discussion of the attaining of the foundations for general knowledge, and of the construction of general knowledge once these foundatio11s have been obtained ‒Professor Yolton agrees with my argument. His major concern consists in urging me to extend my thesis into the domain of knowledge of nature. The main question is whether the method I have argued is present in Locke's Essay can help account for particular knowledge claims Locke might make in physics rather than in the realm of conceptual relations, in the realm of the mixed modes of mathematics, geometry, and morals. The difficulty I here face (and hence one reason for the limitation of my thesis to that of general knowledge) is stated unambiguously by Locke himself: