The first comparative study of the sceptical reception of representationalism in medieval and early modern thought.Looking at key figures and lesser-known names, this volume is the first to show how the theory of representation was seen as a source of scepticism by medieval and early modern philosophers alike. This book will be of interest to philosophers and historians of medieval and early modern thought.Looking at key figures and lesser-known names, this volume is the first to show how the theory of representation was seen as a source of scepticism by medieval and early modern philosophers alike. This book will be of interest to philosophers and historians of medieval and early modern thought.In this book Han Thomas Adriaenssen offers the first comparative exploration of the sceptical reception of representationalism in medieval and early modern philosophy. Descartes is traditionally credited with inaugurating a new kind of scepticism by saying that the direct objects of perception are images in the mind, not external objects, but Adriaenssen shows that as early as the thirteenth century, critics had already found similar problems in Aquinas's theory of representation. He charts the attempts of philosophers in both periods to grapple with these problems, and shows how in order to address the challenges of scepticism and representation, modern philosophers in the wake of Descartes often breathed new life into old ideas, remoulding them in ways that we are just beginning to understand. His book will be valuable for historians interested in the medieval background to early modern thought, and to medievalists looking at continuity with the early modern period.Introduction; Part I. The Veil of Species: 1. Through species to the world. Aquinas and Henry of Ghent; 2. Perception without intermediaries. Olivi's critique of species; 3. Direct realism about perception and beyond. Auriol and Ockham; Part II. The Veil of Cartesian Ideas: 4. Transformations of Cartesianism. MalcC