Philosophy / Unit 3 Philosophy 0117 short lesson, about 20 seconds
Gaunilo's Island
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The idea
Gaunilo's parody objection: by the same reasoning, a greatest conceivable island must exist—so the reasoning proves too much to prove anything.
In practice
Define the perfect island; note that existing is more perfect than not existing; conclude the island exists. Nobody books the trip.
Your place on the trail
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