ABSTRACT
The Natural Class theory treats the naturalness of a class as an overall or, as it were, a gestalt property of the class. The Resemblance theory, however, tries to analyze this property in terms of resemblance relations holding between the individual members of the class, in terms of what John Locke called "the similitudes between things." The Resemblance theory analyzes the notion of a natural class in terms of networks of resemblance relations holding between the members of the class, relations that also admit of degree. Resemblance Nominalists seem not to have thought enough about the consequences of resemblance's being an internal relation. There has been little discussion of relations by Resemblance Nominalists, The chief problem seems to be to identify the terms between which the relevant resemblances are supposed to hold. The relation of resemblance therefore, must be a true universal and having been forced to admit this universal.
