Anselm's Other ArgumentAnselm of Canterbury (1033 1109 CE), in his work Proslogion, originated the ontological argument for God's existence, famously arguing that something than which nothing greater can be conceived, which he identifies with God, must actually exist, for otherwise something greater could indeed be conceived. Some commentators have claimed that although Anselm may not have been conscious of the fact, the Proslogion as well as his Reply to Gaunilo contains