Kant’s Crucial Contribution to Euler Diagrams

Abstract Logic diagrams have been increasingly studied and applied for a few decades, not only in logic, but also many other fields of science. The history logic is an important subject, as current systems applications are based on historical predecessors. While traditional histories cite pioneers such Leibniz, Euler, Venn, Peirce, it widely known that Kant the early Kantians Germany England played crucial role popularising Euler(-type) diagrams. In this paper, late eighteenth nineteenth centuries will be analysed more detail. It shows (or intuition general) were highly contentious topic depend philosophical attitude went beyond to touch issues physics, metaphysics, linguistics and, above all, mathematics.