Added Two Varieties of ‘Possible’ and the Ontological Argument (2020) by James Henderson to the Ontological Arguments page under Arguments for the Existence of a God in the Modern Documents section of the Secular Web Library.
The ontological argument for the existence of God has a long and well-discussed history. First clearly articulated by St. Anselm in 1078, it almost immediately generated lively debate, debate that continues to the present day. Attacks on the argument have been launched by Gaunilo, St. Thomas Aquinas, David Hume, Immanuel Kant, and others, and those attacks have forced supporters of the argument (including, but not limited to, Alvin Plantinga, William Alston, and David Bentley Hart) to present different formulations of it. This has sharpened the lines of demarcation between the two sides and made the issues involved clearer. In this article, James R. Henderson addresses an aspect of the debate that has been largely neglected—exactly what it means to “exist in the mind” in Anselm’s sense. Henderson ultimately concludes that the coherence of the concept of God needs to be established before the ontological argument can be given any weight.