Lowe investigates the forms of thought, showing how this study is crucial to understanding the powers of the intellect.Forms of thought are involved whenever we name, describe, or identify things, and distinguish between what is, might, or must be the case; studying these structures is the main task of philosophical logic. The book will be of interest to students of epistemology and metaphysics, and philosophy of mind and language.Forms of thought are involved whenever we name, describe, or identify things, and distinguish between what is, might, or must be the case; studying these structures is the main task of philosophical logic. The book will be of interest to students of epistemology and metaphysics, and philosophy of mind and language.Forms of thought are involved whenever we name, describe, or identify things, and whenever we distinguish between what is, might be, or must be the case. It appears to be a distinctive feature of human thought that we can have modal thoughts, about what might be possible or necessary, and conditional thoughts, about what would or might be the case if something else were the case. Even the simplest thoughts are structured like sentences, containing referential and predicative elements, and studying these structures is the main task of philosophical logic. This clear and accessible book investigates the forms of thought, drawing out and focusing on the central logical notions of reference, predication, identity, modality and conditionality. It will be useful to students and other interested readers in epistemology and metaphysics, philosophy of mind and language, and philosophical logic.Preface; 1. Introduction; Part I. Reference and Predication: 2. Individuation, reference, and sortal terms; 3. Dispositional versus occurrent predication; 4. Predication and categories; Part II. Identity: 5. What is a criterion of identity?; 6. Identity conditions and their grounds; Part III. Modality: 7. Identity, vagueness, and modality; 8. Necessl“8