1. School of History & Politics, University of Adelaide, Napier Building, The University of Adelaide, Adelaide, SA, 5005, Australia 2. Department of History and Philosophy of Science, University of Cambridge, Free School Lane, Cambridge, CB2 3RH, UK 3. Faculty of Economics and Business, University of Amsterdam, Valckenierstraat 65-67, 1018 XE, Amsterdam, The Netherlands 4. Department of Philosophy, University of Twente, Postbox 217, 7500 AE, Enschede, The Netherlands