Markus Gabriel (Dr. phil., Dr. phil. habil., Heidelberg). He holds the chair in epistemology, modern, and contemporary philosophy at the University of Bonn, Germany, and also serves as the Director of its International Centre for Philosophy. He works mainly in epistemology and metaphysics (ontology) drawing his inspirations from the history of philosophy (in particular, 19th century Post-Kantian philosophy, Heidegger, and Wittgenstein). He has a particular interest in problems of skepticism and their history. His recent books are Transcendental Ontology: Essays in German Idealism and Die Erkenntnis der Welt. Eine Einführung in die Erkenntnistheorie (Knowledge of the World. An Introduction to Epistemology).