Abstract

In the present paper, I intend to show the role in Leibniz’s overall philosophy of his definition of a complete notion as a concept that contains every predicate of a certain subject. I will try to argue that this definition consists in an exoteric and more intuitive or accessible device directed to those unfamiliar with the intricacies of his views on logic and also that it plays a pedagogical role in his writings. In addition, I intend to explain away the seeming mismatch between this definition and that of individual substance, as well as Leibniz’s definitions of truth and proposition based on the relation of concept containment. In doing so, I will try to show that the definition above of a complete notion provides an important argument for the existence of such notions based on our ordinary talk about individuals and also how my proposal deals with Donald Rutherford’s problem of this definition’s extensional correctness vis-a-vis accidents.