peting theories of vagueness. Nonetheless, when Tek is borderline tall, it does seem that the unclarity about whether he is tall is not merely epistemic (i.e. such. Cambridge Studies in Philosophy: Theories of Vagueness by Rosanna Keefe, , available at Book Depository with free delivery worldwide. In this book Rosanna Keefe explores the questions of what we should want from theories of vagueness and how we should compare them. Her powerful and.

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Vaguenesss, its Nature and its Logic. One of his students, Henry Mehlberg went on to substitute gaps for gluts.

Cambridge Studies in Philosophy: Theories of Vagueness

Simple sentences about borderline cases lack a truth-value. The mere fact that an ambiguous statement comes out true under all its disambiguations does not show that the statement itself is true. Every form of deviant logic has been applied in the hope of resolving the sorites paradox.

Built on the Johns Hopkins University Campus. Her discussion ranges widely and comprehensively vaguensss the main theories of vagueness and their supporting arguments, and she offers a powerful and original defence of a form of supervaluationism, a theory that requires almost no deviation from standard logic yet can accommodate the lack of sharp boundaries to vague predicates and deal with the paradoxes of vagueness in a methodologically satisfying way.


This hypothesis is plausible for newcomers to the sorites paradox. According to Nicholas Smithwe cannot even guess that the threshold for baldness is the th hair.

Theories of Vagueness – Rosanna Keefe – Google Books

The conclusion is false because a year old man is clearly a non-child. Trenton Merricks claims that standard characterizations of linguistic vagueness rely on metaphysical vagueness. Has the circle been revealed to be an infinitely sided polygon?

Vaagueness first part, consisting of Chs. Supervaluationists emphasize the distinction between words and objects. It alarms oof who think we should be judged by laws rather than men. Have curved lines been replaced by straight lines? The deliberator may accept the tautologies of classical logic as constraints governing competing plans for drawing lines. Objects themselves do not seem to be the sort of thing that can be general, ambiguous, or vague Eklund Sainsbury advises the sorites monger to present his premises in apparently random order.

Moreover, it seems that both vagueness and ambiguity ought to be minimized. Most theorems of standard logic break down when intermediate truth-values are involved.

In the eyes of the supervaluationist, a demonstration that a statement is not true does not guarantee that the statement is false.

Is this indeterminacy in thought to be reduced to indeterminacy in language? Normally, the added disjunct in a vaguenesw claim is not more plausible than the other disjuncts. Where vagueneas is no decision to be made, there is no scope for vice. Back to the Open Future1. Rosanna Keefe University of Sheffield. George Boolos observes that we have an autonomous case against the induction step.


He crafts the rules for vague partial belief to provide a psychological solution to the sorites paradox. Thus the logic of vagueness is a logic for equivocators.

But I know enough about words to dismiss this as a serious possibility. Kefe many-valued rule for disjunction is to assign the whole statement the truth-value of its highest disjunct.

Or consider an inductive predicate that is too complex for us to reason with. Where does the tail of a snake begin?

Think of all the automotive misery that has keeef prefaced by. This consensus was re-affirmed by Michael Dummett and vagieness re-avowed by subsequent commentators. Scott Soamesanswers that all vague words literally are indexical. Discretion through gap-filling pleases those who regard adjudication as a creative process.

Inquiry resistance typically recurses. Many-valued Logic An early favorite was many-valued logic. Dandelions are unwanted by lawn caretakers but are desired by farmers for food, wine, and medical uses.