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13847 | If non-existent things are self-identical, they are just one thing - so call it the 'null object' [Bostock] |
Full Idea: If even non-existent things are still counted as self-identical, then all non-existent things must be counted as identical with one another, so there is at most one non-existent thing. We might arbitrarily choose zero, or invent 'the null object'. | |
From: David Bostock (Intermediate Logic [1997], 8.6) |