Preface; XI; Chapter 1; The cognitive basis of language: Language and thought 1; 1.0 Overview 1; 1.1 Introduction: Sign systems 1; 1.2 Structuring principles in language 5; 1.3 Linguistic and conceptual categories 13; 1.4 Summary 20; 1.5 Further reading 21; Assignments 22; Chapter 2; What's in a word? Lexicology 25; 2.0 Overview 25; 2.