This book proposes a bold idea. Living beings are distinguishing distinctions. Single cells and multicellular organisms maintain themselves distinct by drawing distinctions. This iswhatorganisms are andwhatthey do. From this starting point, key issues examined range across ontology, epistemology, phenomenology, logic, and ethics. Topics discussed include the origin of life, the nature and purpose of biology, the relation between life and logic, the nature and limits of formal logic, the nature of subjects, the subject-object relation, subject-subject relationships and the deep roots of...