But the further terms are removed from physical objects, the more opportunity is there for ambiguity. In the realm of politics and morals, as Socrates was fond of pointing out, the chief difficulties and misunderstandings of men have come from the ambiguities of the terms they use. "Justice," "liberty," "democracy," "good," "true," "beautiful," these have been immemorial bones of contention among philosophers. They are accepted, taken for granted, without any question as to their meaning by the individual, until he finds, perhaps, in discussion that his acceptation of the term is entirely different from that of his opponent. Thus many an argument ends with "if that's what you mean, I agree with you." Intellectual inquiry and discussion to be fruitful must have certain definitive terms to start with. Discussion ... needs to have the ground or basis of its various component statements brought to consciousness in such a way as to define the exact value of each. The Socratic contention is the need compelling the common denominator, the common subject, underlying the diversity of views to exhibit itself. It alone gives a sure standard by which the claims of all assertions may be measured. Until this need is met, discussion is a self-deceiving play with unjudged, unexamined matters, which, confused and shifting, impose themselves upon us.[1] [Footnote 1: Dewey: _Essays in Experimental Logic_, p. 200.] To define our terms means literally to know _what_ we are talking about and what others are talking about. One of the values of discussion is that it enables us more clearly to realize the meaning of the words with which we constantly operate. A man may entertain for a long while a half-conscious definition of democracy as meaning political equality, and suddenly come face to face with another who means by it industrial cooeperation and participation on the part of all workers. Whether he agrees with the new definition or not, at least his own becomes clearer by contrast. "Science," wrote Condillac, "is a well-made language." No small part of the technique of science lies in its clear definition of its terms. The chemist knows what he means by an "acid," the biologist by a "mammal." Under these names he classifies all objects having certain determinable properties. Social science will never attain the precision of the physical sciences until it also attains as clear and unambiguous a terminology. As we shall see in the chapter on science, however, the definitions in the physical sciences are arrived at through precise inquiries not yet possible in the field of social phenomena. CHAPTER XI RACIAL AND CULTURAL CONTINUITY