Combining Philosophers

Ideas for Dean W. Zimmerman, Kit Fine and Sophocles

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5. Theory of Logic / D. Assumptions for Logic / 2. Excluded Middle

9775	Excluded Middle, and classical logic, may fail for vague predicates [Fine,K]
	Full Idea: Maybe classical logic fails for vagueness in Excluded Middle. If 'H bald ∨ ¬(H bald)' is true, then one disjunct is true. But if the second is true the first is false, and the sentence is either true or false, contrary to the borderline assumption.
	From: Kit Fine (Vagueness, Truth and Logic [1975], 4)
	A reaction: Fine goes on to argue against the implication that we need a special logic for vague predicates.