Abstract

In this essay, I argue that for sentences of form “A is B” there isa distinction between identity and “mere” predication to be made, and thatLeśniewski’s Ontology puts us in a better position to make this distinctionthan first-order predicate logic. I also gesture at how Ontology could helpus to decide questions of identity. The nub of the matter seems to be a“primordial” sense of the copula that Ontology has at its basis