Skip navigation

Rosanna Kenney

Rosanna Keefe is a Research Fellow at Jesus College, Cambridge University

Titles by This Editor

A Reader

Vagueness is currently the subject of vigorous debate in the philosophy of logic and language. Vague terms—such as 'tall', 'red', 'bald', and 'tadpole'—have borderline cases (arguably, someone may be neither tall nor not tall); and they lack well-defined extensions (there is no sharp boundary between tall people and the rest). The phenomenon of vagueness poses a fundamental challenge to classical logic and semantics, which assumes that propositions are either true or false and that extensions are determinate.

A Reader
Edited by Rosanna Kenney

Vagueness is currently the subject of vigorous debate in the philosophy of logic and language. Vague terms-such as "tall", "red", "bald", and "tadpole"—have borderline cases (arguably, someone may be neither tall nor not tall); and they lack well-defined extensions (there is no sharp boundary between tall people and the rest). The phenomenon of vagueness poses a fundamental challenge to classical logic and semantics, which assumes that propositions are either true or false and that extensions are determinate. Another striking problem to which vagueness gives rise is the sorites paradox.