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ontological argument

noun, Philosophy
an a priori argument for the existence of God, asserting that as existence is a perfection, and as God is conceived of as the most perfect being, it follows that God must exist; originated by Anselm, later used by Duns Scotus, Descartes, and Leibniz.
Also called ontological proof.
1875-80 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for onto-logical proof

ontological argument

noun (philosophy)
the traditional a priori argument for the existence of God on the grounds that the concept itself necessitates existence Compare cosmological argument, teleological argument
any analogous argument from the nature of some concept to the existence of whatever instantiates it
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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