Prof. Dr. Wansing (M.A. Phil., Free University of Berlin, 1988; D. Phil., Free University of Berlin, 1992; Habilitation in Logic and Analytical Philosophy, University of Leipzig, 1997) is Professor of Logic and Epistemology at the Ruhr University Bochum, and conducts research in philosophical logic, modal logic, non-classical logic and epistemology.

Yang Liu is a doctorate candidate in philosophy at Columbia University, specializing in logic and the foundations of probability theory, normative decision theory, and game theory.