Meta Ontology

Presented here is an argument for the existence of universals. Like Church's translation-$<$span class='Hi'$>$test$<$/span$>$ argument, the argument turns on considerations from intensional logic. But whereas Church's argument turns on the fine-grained informational content of intensional sentences, this argument turns on the distinctive logical features of 'that'-clauses embedded within modal contexts. And unlike Church's argument, this argument applies against truth-conditions nominalism and also against conceptualism and in re realism (the doctrine that universals are ontologically dependent upon the existence of instances). So if the argument is successful, it serves as a defense of full ante rem realism (the doctrine that universals exist independently of the existence of instances). The argument emphasizes the need for a unified treatment of intensional statements -- modal statements as well as statements of assertion and belief. The larger philosophical moral will be that ante rem universals are uniquely suited to carry a certain kind of modal information. Linguistic entities, mind-dependent universals, and instance-dependent universals are incapable of serving that function.