Ontological_Argument_Handout

Ontological_Argument - (1 Gaunilo Island exists in the understanding but not in reality(2 Existence in reality is greater than existence in the

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Anselm’s Argument Definition: God = the greatest conceivable being (1) God exists in the undertanding but not in reality (Assumption) (2) Existence in reality is greater than existence in the understanding alone (3) A being having all God’s properties plus the additional property of existence in reality can be conceived (4) A being having all God’s properties plus the additional property of existence in reality is greater than God [From (1) and (2)] (5) Thus, a being greater than God can be conceived [From (3) and (4)] (6) Thus, a being greater than the greatest conceivable being can be conceived [From (5) and the definition of “God”] (7) But (6) is false (8) Assumption (1) entails (6) (9) Thus, (1) is false [From (7) and (8)] (10) God exists in the undertanding (11) Thus, God exists in reality [From (9) and (10)]
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Gaunilo’s Parody of Anselm’s Argument Definition: Gaunilo Island = the greatest conceivable island
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Unformatted text preview: (1) Gaunilo Island exists in the understanding but not in reality (2) Existence in reality is greater than existence in the understanding alone (3) An island having all Gaunilo Island’s properties plus existence in reality can be conceived (4) An island having all Gaunilo Island’s properties plus existence in reality is greater than Gaunilo Island [From (1) and (2)] (5) Thus, an island greater than Gaunilo Island can be conceived [From (3) and (4)] (6) Thus, an island greater than the greatest conceivable island can be conceived [From (5) and the definition of “Gaunilo Island”] (7) But (6) is false (8) Assumption (1) entails (6) (9) Thus, (1) is false [From (7) and (8)] (10) Gaunilo Island exists in the understanding (11) Thus, Gaunilo Island exists in reality [From (9) and (10)]...
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This note was uploaded on 01/24/2012 for the course PHIL 1 taught by Professor Lewis during the Fall '08 term at UCSB.

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Ontological_Argument - (1 Gaunilo Island exists in the understanding but not in reality(2 Existence in reality is greater than existence in the

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