 Russell’s first published account of his newfound realism came in the 1903 classic The Principles of Mathematics (POM). Part I of POM is dedicated largely to a philosophical inquiry into the nature of propositions. Russell took over from Moore the conception of propositions as mind-independent complexes; a true proposition was then simply identified by Russell with a fact (cf. MTCA, 75–76). However, Moore’s characterization of a proposition as a complex of concepts was largely in keeping with traditional Aristotelian logic in which all judgments were thought to involve a subject concept, copula and predicate concept.  Russell, owing in part to his own views on relations, and in part from his adopting certain doctrines stemming from Peano’s symbolic logic, sought to refine and improve upon this characterization. 