Steve Awodey is Professor of Philosophy and Mathematics at Carnegie Mellon University and specializes in category theory and logic. He studied philosophy and mathematics at Philips University Marburg, Germany, and the University of Chicago. Greg Frost-Arnold is Associate Professor of Philosophy at Hobart and William Smith Colleges. He earned a bachelor's degree in philosophy from the University of Chicago and received a PhD in History and Philosophy of Science, as well as a master's degree in philosophy, from the University of Pittsburgh. He was one of the founding editors of The Journal of the History of Analytical Philosophy, and is Book Reviews Editor at History of Philosophy of Science.