Ontological argument
Ontological argument
Name by which later authors, especially Kant, designate the alleged proof for God’s existence devised by Anselm of Canterbury. Under the name of God, so the argument runs, everyone understands that greater than which nothing can be thought. Since anything being the greatest and lacking existence is less then the greatest having also existence, the former is not really the greater. The greatest, therefore, has to exist. Anselm has been reproached, already by his contemporary Gaunilo, for unduly passing from the field of logical to the field of ontological or existential reasoning. This criticism has been repeated by many authors, among them Aquinas. The argument has, however, been used, if in a somewhat modified form, by Duns Scotus, Descartes, and Leibniz. — R.A.