Set theory tractarian ontology?

Abstract

The present research is based on two objectives: (i) to present G. Lando's proposal, according to which Tractarian ontology must be conceived through the language of set theory, and (ii) to present various difficulties faced by this proposal. Regarding (ii), the main point will be to argue that the strategies Lando mentions to avoid the problems associated with the adoption of extensionalism are inadequate. From this, it will be concluded that extensionalism cannot be made compatible with Tractarian ontology; therefore, Lando's proposal is untenable.