Oswald Hanfling

• Oswald Hanfling was Professor of Philosophy at the Open University, and author of many books and articles, including Philosophy and Ordinary Language (Routledge 2000), and Wittgenstein and the Human Form of Life (Routledge 2002). When he died in 2005, he was working on a project to explain why we have moral concepts by reference to ‘necessary’ facts about human life and language.

Stephen K. McLeod

• Stephen McLeod is Lecturer in Philosophy at the University of'Liverpool, where he teaches logic and ontology. He is the author of Modality and Anti-Metaphysics (2001) and articles on modality, essentialism, and existence.

Olli Lagerspetz

• Olli Lagerspetz is Professor of Philosophy at Åbo Akademi University, Finland. He was previously Lecturer of Philosophy at the University of Wales, Swansea. His publications include Trust: The Tacit Demand and (in Swedish) Smuts: En bok om världen, vårt hem, a book on the concepts of dirt and cleanliness.

Tony Milligan

• Tony Milligan is Teaching Fellow in Philosophy at the University of Aberdeen. His research interests include virtues, emotions, and desires. His previous publications include articles in Ratio, Religious Studies, and Philosophical Investigations.

Alexander Sarch

• Alexander Sarch is a Ph.D. candidate in Philosophy at the University of Massachusetts, Amherst. His research focuses on questions in moral philosophy pertaining to objectivity and individual welfare, as well as questions about the value of external goods such as status and honour.

Rom Harré

• Rom Harré currently teaches at Georgetown University in Washington DC. For many years he was University Lecturer in Philosophy of Science at Oxford University and Fellow of Linacre College. He has published in philosophy of physics and extensively on psychological topics connected with the role of language in cognition.