Vagueness

Vagueness and Identity - Article by Loretta Torrago presented at the 20th World Congress of Philosophy. Makes the surprising argument that vagueness in identity statements is incompatible with vagueness of constitution.
http://www.bu.edu/wcp/Papers/Meta/MetaTorr.htm

Russell on Vagueness - Online text of Russell's 1923 article.
http://www.santafe.edu/~shalizi/Russell/vagueness/

Vagueness and the Sorites Paradox - A resource for philosophers and other researchers, including a bibliography on vagueness, plus lists of online articles, homepages of people working in the area and related external resources.
http://www.btinternet.com/~justin.needle/

How to Make Our Ideas Clear - 1878 article Charles Pierce.
http://www.peirce.org/writings/p119.html

Vague Concepts and Sorites Paradoxes - Article by Vlad Vieru.
http://www.ici.ro/ici/revista/sic1998_3/art09.html

Where Demonstratives Meet Vagueness: Possible Languages - Article by Adam Morton, which appeared in Proc. Aristotelian Society. Argues that vagueness and demonstratives are connected, by means of constructing artificial languages in which the relationships are manufactured.
http://cogprints.org/237/

Vagueness - Article in the Stanford Encyclopaedia of Philosophy, by Roy Sorensen.
http://plato.stanford.edu/entries/vagueness/

Vagueness and Ambiguity - A little test to help distinguish vagueness from ambiguity (from San Jose University's critical thinking pages).
http://www.sjsu.edu/depts/itl/graphics/vague/vague.html

Vagueness and the Sorites Paradox - Site maintained by Justin Needle. Extensive links, and excerpts from his PhD thesis `Ruling Out the Sorites: Vagueness, Rules, Wittgenstein'.
http://www.falakros.net/

Vagueness, Semantics, and the Language of Thought - Article by Richard DeWitt.
http://psyche.cs.monash.edu.au/v1/psyche-1-01-dewitt.html