Philosophical Investigations
Raatzsch studied philosophy and history at Martin-Luther-Universität Halle-Wittenberg (Germany). After earning his Ph.D. at that institution, he pursued a teaching and research career at the University of Leipzig, first at the Institute for Logic and Philosophy of Science ("Institut für Logik und Wissenschaftstheorie"), and subsequently at the Institute for Philosophy ("Institut für Philosophie"). In 1999, he earned the habilitation degree for a study of Ludwig Wittgenstein's "Philosophical Investigations"; the study was published in book form under the title "Eigentlich Seltsames. Wittgensteins Philosophische Untersuchungen. Ein Kommentar" ("Something Strange. Wittgenstein's Philosophical Investigations. A Commentary") in 2003.