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Offered modal form of the argument: God must exist in all possible worlds since maximally great and excellent
God's existence neither impossible nor contingent=>necessary
Doctrine of existence as perfection='remarkably queer'
God's existence has to be demonstrated a posteriori, Anselm's definition of God not necessarily shared by all believers
Used example of perfect island to demonstrate that if logic of argument applied to things other than God it led to invalid conclusions
Reductio ad absurdum
Method of reasoning aiming to show truth of something by reducing to absurdity the very opposite
Cancer, evil dictators and tsunamis
Things we would consider more perfect if only existed in the mind
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