Abstract

The paper begins by considering Russell's criticism of Meinong's theory of objects and Sosein that center on the notions of negation and existence. The discussion raises issues about functions, properties, predication, the "concept" of existence and relations. These lead to a consideration of recent revivals of moderate nominalism in the form of trope theories. An argument against such theories suggests a fundamental principle of ontology and a reformulation of the nominalism-realism dispute.