Rumfitt on truth-grounds, negation, and vagueness
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In The Boundary Stones of Thought (2015), Rumfitt defends classical logic against challenges from intuitionistic mathematics and vagueness, using a semantics of pre-topologies on possibilities, and a topological semantics on predicates, respectively. These semantics are suggestive but the characterizations of negation face difficulties that may undermine their usefulness in Rumfitt’s project.
KeywordsNegation Vagueness Intuitionism Logical pluralism Non-classical logic
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