Elke Brendel is Professor of Philosophy at the Johannes Gutenberg University in Mainz, Germany. She has published numerous articles on logic, epistemology, the philosophy of science, and the philosophy of language. She is the author of Die Wahrheit uber den Lugner (The Truth About the Liar, 1992), Grundzuge der Logik II - Klassen, Relationen, Zahlen (Foundations of Logic II - Sets, Relations, Numbers, with Wilhelm K. Essler, 1993), and Wahrheit und Wissen (Truth and Knowledge, 1999). Christoph Jager is Lecturer in Philosophy at Aberdeen University, United Kingdom, and Privatdozent of Philosophy (honorary office) at the University of Leipzig, Germany. He has published numerous articles on epistemology, the philosophy of mind, and the philosophy of religion. Books: Selbstreferenz und Selbstbewusstsein (Self-reference and Self-knowledge, 1999), Analytische Religionsphilosophie (Analytic Philosophy of Religion, ed., 1998), Kunst und Erkenntnis (Art and Knowledge, ed., with Georg Meggle, 2004), Religion und Rationalitat (Religion and Rationality, forthcoming).