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Ideas for 'Exigency to Exist in Essences', 'What are Sets and What are they For?' and 'The Inference to the Best Explanation'

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5. Theory of Logic / I. Semantics of Logic / 3. Logical Truth

14245	Logical truths are true no matter what exists - but predicate calculus insists that something exists [Oliver/Smiley]
	Full Idea: Logical truths should be true no matter what exists, so true even if nothing exists. The classical predicate calculus, however, makes it logically true that something exists.
	From: Oliver,A/Smiley,T (What are Sets and What are they For? [2006], 5.1)