Zongyuan Tang

The central question in this book is why it seems reasonable for the words of our language to divide up the world in ordinary ways rather than other imaginable ways. Hirsch calls this the division problem. His book aims to bring this problem into sharp focus, to distinguish it from various related problems, and to consider the best prospects for solving it. In exploring various possible responses to the division problem, Hirsch examines series of "division principles" which purport to express rational constraints on how our words ought to classify and individuate. The ensuing discussion deals with a wide range of metaphysical and epistemological topics, including projectibility and similarity, alternative analyses of natural properties and things, the inscrutability of reference, and the relevance of such pragmatic notions as salience and economy. The final chapters of the book develop what Hirsch contends is the most promising response to the division problem: a theory in which constraints on classification and individuation are seen to derive from the necessary structure of "fine-grained" propositions and the necessary dependence of some concepts on others.

In this book Eli Hirsch identifies and explores a `new' philosophical problem. Hirsch calls this new problem `the division problem'. This is defined as the problem of explaining why our language divides up reality in one way rather than another, or what the rational basis is for our language to contain certain kinds of general words rather than others. Hirsch shows that a language can be constructed which describes reality in ways we would find absurdly irrational, for example by classifying normally disparate items under the same general term. Having demonstrated that this newly identified problem is in fact a serious one which cannot be easily solved or brushed aside, Hirsch offers his own suggestions for a possible solution.