 A few different paraconsistent approaches to vagueness have been suggested. Subvaluationism is the logical dual to supervaluationism: if a claim is true on some acceptable sharpening of a vague predicate, then it is true. Where the supervaluationist sees indeterminacy, or truth-value gaps, the subvaluationist sees overdeterminacy, truth-value gluts. A subvaluation logic will, like its supervaluational dual, preserve all classical tautologies, as long as the definition of validity is restricted to the non-glutty cases. Because it is so structurally similar to supervaluationism, subvaluationism is also subject to most of the same criticisms (Hyde 1997).