One question here is whether Leibniz and Kant agree sufficiently in their views of concepts for Kant’s arguments to have any bite against the kind of view Leibniz expresses in the New Essays, a text that Kant read sometime after it was first available in 1765 (Vaihinger 1922, 2: 133, 414 and 428–9). Leibniz, famously, has the idea of a complete concept of a substance, and it seems that such as concept would contain an infinite number of constituents—God grasps the complete concept of a substance