Bas Aarts & David Denison 
Fuzzy Grammar [PDF ebook] 
A Reader

This book brings together classic and recent papers in the philosophical and linguistic analysis of fuzzy grammar, gradience in meaning, word classes, and syntax. Issues such as how many grains make a heap, when a puddle becomes a pond, and so forth, have occupied thinkers since Aristotle and over the last two decades been the subject of increasing interest among linguists as well as in fields such as artificial intelligence and computational linguistics. The work isdesigned to be of use to students in all these fields. It has a substantial introduction, is divided into thematic parts, contains annotated sections of further reading, and is fully indexed.