The Design for Thinking is as the subtitle says..a first book in semantics. "Our study is a branch of applied psychology; and like most other practical activities, it is an art which calls for a sound working knowledge of the anatomy and physiology of the subject" (the study of language and it usage). It delineates what is "thinking" by dividing it into six basic phases: 1.Conceptualizaion 2. Qualification 3. Classification 4. Structure Analysis 5. Operation Analysis 6. Analogy. Chapters heading include Meaning, Ambiguity, Metaphor, The Practice of Definition, Problem Solving, as well as The Noblest Function of Language (the affective function of language). It has been the most useful book on language that I have read.