 Even when described in terms of stages of theory construction, analysis and logical construction are not simply converse operations. Russell stresses that the objects discovered and distinguished in analysis are “real” as are their differences from each other. Thus there is a constraint on the “choice” of definitions and primitive propositions with which to begin. The relationships between a deductive system and a realistic ontology differ among the various cases that Russell lists as examples of logical constructions. Propositions and “complexes” such as facts are analyzed in order to find the real objects and relations of which they are composed. A logical construction, on the other hand, results in a theory from which truths follow by logical inferences. The truths that are part of a deductive system resulting from logical construction are only “reconstructions” of some of the “pre-theoretic” truths that are to be analyzed. It is only their deductive relations, in particular their deducibility from the axioms of the theory, that are relevant to the success of a construction. Logical constructions do not capture all of the features of the pre-theoretic entities with which one begins.