 Obviously it is mainly point (3) that is of importance for the question of whether dualism or idealism is involved in Locke’s version of the operations of the mind. Again, as in the case of Hobbes, it seems that Locke’s position is meant to be neutral against and compatible with all these alternatives and that he wishes to stay agnostic with respect to them. This is indicated especially well by his theory of substance and his remarks concerning the limits of knowledge. Substances, Locke famously holds, 