Mario De Caro is associate professor of moral philosophy at University of Rome 3. He was a Fulbright Fellow at Harvard University and has taught at Tufts University. He has edited several anthologies, including, with David Macarthur, Philosophy in an Age of Science, two new volumes of essays by Hilary Putnam. David Macarthur is senior lecturer in philosophy at the University of Sydney. He has published articles on skepticism, naturalism, neopragmatism, and Wittgenstein in leading journals, and, with Mario De Caro, is the editor of Naturalism in Question.