Note 14 — Chapter II

Human Understanding, bk. ii., chap. ii., 10, 11. To this passage Berkeley objected that it is impossible to form an abstract idea of quality as apart from any concrete idea of object; e.g. an idea of motion distinct from that of any body moving. (See Principles of Human Knowledge, Introd. vii.-xix.). This is a point which I cannot fully treat without going into the philosophy of the great discussion on Nominalism, Realism, and Conceptualism—a matter which would take me beyond the strictly psychological limits within which I desire to confine my work. It will, therefore, be enough to point out that Berkeley’s criticism here merely amounts to showing that Locke did not pursue sufficiently far his philosophy of Nominalism. What Locke did was to see, and to state, that a general or abstract idea embodies a perception of likeness between individuals of a kind while disregarding the differences; what he failed to do was to take the further step of showing that such an idea is not an idea in the sense of being a mental image; it is merely an intellectual symbol of an actually impossible existence, namely, of quality apart from object. Intellectual symbolism of this kind is performed mainly through the agency of verbal or other conventional signs (as we shall see later on), and it is owing to a clearer understanding of this process that Realism was gradually vanquished by Nominalism. The only difference, then, between Locke and Berkeley here is, that the nominalism of the former was not so complete or thorough as that of the latter. I may remark that if in the following discussion I appear to fail in distinctly setting forth the doctrine of nominalism, I do so only in order that my investigation may avoid needless collision with conceptualism. For myself I am a nominalist, and agree with Mill that to say we think in concepts is only another way of saying that we think in class names.