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Robert Fiengo & Robert May, Indices and identity . (Linguistic Inquiry Monograph 24.) Cambridge, MA: MIT Press, 1994. xvii+315.

The book under review deals with the nature of identity required for grammatical processes. It defends the need for grammar to explicitly represent a relevant notion of identity for expressions, and proposes a particular mechanism for expressing this grammatically relevant notion of identity. Much work in generative grammar, over the past thirty years, has attempted to characterize the notion of identity that is requisite for a complete characterization of anaphora. It is clear that lexical identity is not necessary, as the following well-known examples make clear, with respect to VP-ellipsis: