We think with objects—we conduct our lives surrounded by external devices that help us recall information, calculate, plan, design, make decisions, articulate ideas, and organize the chaos that fills our heads. Medieval scholars learned to think with their pages in a peculiar way: drawing hundreds of tree diagrams. Lines of Thought is the first book to investigate this prevalent but poorly studied notational habit, analyzing the practice from linguistic and cognitive perspectives and studying its application across theology, philosophy, law, and medicine. These diagrams not only allow a glimpse into the thinking practices of the past but also constitute a chapter in the history of how people learned to rely on external devices—from stone to parchment to slide rules to smartphones—for recording, storing, and processing information. Beautifully illustrated throughout with previously unstudied and unedited diagrams, Lines of Thought is a historical overview of an important cognitive habit, providing a new window into the world of medieval scholars and their patterns of thinking.

How can we think about maths, despite the immateriality of numbers, sets, and other mathematical entities? How are we able to think about what might have happened if history had taken a different turn? Questions like these turn up in nearly every part of cognitive science and are central to our human position of having limited knowledge of what is true.

It is considerably easier to say that modern philosophy began with Descartes than it is to define the modernity and philosophy to which Descartes gave rise. In Lines of Thought, Claudia Brodsky Lacour describes the double origin of modern philosophy in Descartes's Discours de la méthode and Géométrie, works whose interrelation, she argues, reveals the specific nature of the modern in his thought. Her study examines the roles of discourse and writing in Cartesian method and intuition, and the significance of graphic architectonic form in the genealogy of modern philosophy. While Cartesianism has long served as a synonym for rationalism, the contents of Descartes's method and cogito have remained infamously resistant to rational analysis. Similarly, although modern phenomenological analyses descend from Descartes's notion of intuition, the "things" Cartesian intuitions represent bear no resemblance to phenomena. By returning to what Descartes calls the construction of his "foundation" in the Discours, Brodsky Lacour identifies the conceptual problems at the root of Descartes's literary and aesthetic theory as well as epistemology. If, for Descartes, linear extension and "I" are the only "things" we can know exist, the Cartesian subject of thought, she shows, derives first from the intersection of discourse and drawing, representation and matter. The crux of that intersection, Brodsky Lacour concludes, is and must be the cogito, Descartes's theoretical extension of thinking into material being. Describable in accordance with the Géométrie as a freely constructed line of thought, the cogito, she argues, extends historically to link philosophy with theories of discursive representation and graphic delineation after Descartes. In conclusion, Brodsky Lacour analyzes such a link in the writings of Claude Perrault, the architectural theorist whose reflections on beauty helped shape the seventeenth-century dispute between "the ancients and the moderns." Part of a growing body of literary and interdisciplinary considerations of philosophical texts, Lines of Thought will appeal to theorists and historians of literature, architecture, art, and philosophy, and those concerned with the origin and identity of the modern.

A show touring US museums examines the process and practice of drawing, showcasing over 500 years of work from Michelangelo to the present day

You don't have to be a genius to sound like one. Here's a collection of the most profound and provocative wit and wisdom in the English language in two lines or less. Edited by entrepreneur John M. Shanahan, who created the wildly successful Hooked on Phonics program, this wonderful book presents the best that has been thought and said on every imaginable topic. Classified by such themes as "Truth, Lies, and Deception," "Men, Women, and Relationships," and "Passions, Virtues, and Vices," these quotes contain timeless messages for all humankind. Oscar Wilde: "A man who marries his mistress leaves a vacancy in that position." Charles de Gaulle: "The cemetery is filled with indispensable men." Abraham Lincoln: "Nearly all men can stand adversity, but if you want to test a man's character, give him power." Sophocles: "Men of ill judgment oft ignore the good that lies within their hands, till they have lost it." Perfect for anyone who has ever been left speechless, this book will make you as glib as Oscar Wilde, as profound as Winston Churchill, and as wise as Aesop. Inspirational, entertaining, and thought-provoking, this is one collection that no library or bookshelf should be without.

This book offers a philosophical exploration of lines in art and culture, and traces their history from Antiquity onwards. Lines can be physical phenomena, cognitive responses to observed processes, or both at the same time. Based on this assumption, the book describes the “philosophy of lines” in art, architecture, and science. The book compares Western and Eastern traditions. It examines lines in the works of Paul Klee, Wassily Kandinsky, and Henri Michaux, as well as in Chinese and Japanese art and calligraphy. Lines are not merely a matter of aesthetics but also reflect the psychological states of entire cultures. In the nineteenth century, non-Euclidean geometry sparked the phenomenon of the “self-negating line,” which influenced modern art; it also prepared the ground for virtual reality. Straight lines, distorted lines, blurred lines, hot and cold lines, dynamic lines, lines of force, virtual lines, and on and on, lines narrate the development of human civilization.

Jason Stanley presents a startling and provocative claim about knowledge: that whether or not someone knows a proposition at a given time is in part determined by his or her practical interests, i.e. by how much is at stake for that person at that time. In defending this thesis, Stanley introduces readers to a number of strategies for resolving philosophical paradox, making the book essential not just for specialists in epistemology but for all philosophers interested in philosophical methodology. Since a number of his strategies appeal to linguistic evidence, it will be of great interest to linguists as well.