Peter Gärdenfors is a professor of cognitive science at Lund University, Sweden. He is a member of the Royal Swedish Academy of Letters, History and Antiquities and recipient of the Gad Rausing Prize. Internationally, he is one of Sweden's most notable philosophers. In 2009, he was elected a member of the Royal Swedish Academy of Sciences.Frank Zenker is a researcher in philosophy at Lund University, Sweden, funded by the Swedish Research Council. Having obtained his doctorate in philosophy of science at the University of Hamburg, Germany, he has worked with Peter Gärdenfors on applying conceptual spaces to theory-dynamical processes in the empirical sciences. He is the editor of “Bayesian Argumentation” (Synthese Library Vol 362, 2013).