This book argues that certain “material falsities” give rise to ideas with objective reality but no corresponding formal reality. In a letter, this book’s author defended one of its conclusions (10[1])by appealing to three types of “primitive notions” and a Scholastic idea of heaviness. An objection by Pierre Gassendi, included in a set of “objections and replies” appended to this book, critiques how this book compares a chiliagon and a myriagon (10[2])to distinguish imagination and pure intellect. Elisabeth of Bohemia pressed this book’s author on how its concepts of extended substance and thinking substance interact. (-5[1])This book claims that “clear and distinct” ideas allowed its author to comprehend a piece of wax. For 10 points, the evil demon appears (10[1])in what book by René Descartes that follows (-5[1])Discourse on Method? (10[2]0[5])■END■