Dr Thrane makes an original contribution to one of the central topics in syntax and semantics: the nature and mechanisms of reference in natural language. He makes a fundamental distinction between syntactic analyses that are internal to the structure of a language and analyses of the referential properties that connect a language with the 'outside world' - and therefore derive in some sense from common human capacities for perceptual discrimination. Dr Thrane argues that the failure to make this distinction and to attend separately to both kinds of analysis has vitiated previous general...