A Paper Withdrawn from Publication [1906]

Paper 6b, Entitled “On the Substitutional Theory of Classes and Relations”, is Russell’s clearest and most public statement of a substitutional theory. Paper 6a is his abstract, written for himself rather than for publication, of 6b. Here he treats propositions as entities (a position which he will abandon in Paper 7) but, as in his earlier papers on this theory, he denies that classes and relations are entities. The structure of Paper 6b stays very close to the abstract 6a, both in what is expressed and in the order of arrangement. (See the Annotations for more details on their relationship.)