THEMES FROM WITTGENSTEIN AND QUINE -- TABLE OF CONTENTS -- Special Topic I WITTGENSTEIN -- Guest Editors Kai BÜTTNER, Florian DEMONT, David DOLBY,Anne-Katrin SCHLEGEL -- Introduction -- Realism, Anti-Realism, Quietism: Wittgenstein's Stance -- Mathematical Propositions as Rules of Grammar -- How Arithmetic is about Numbers. A Wittgensteinian Perspective -- Wittgenstein on Equinumerosity and Surveyability -- Wittgenstein on Formulae -- Brouwer versus Wittgenstein on the Infinite and the Law of Excluded Middle -- Special Topic II QUINE -- Guest Editor Dirk GREIMANN -- Introduction -- Significance in Quine -- Are there Empirical Cases of Indeterminacyof Translation? -- Some Critical Remarks on Quine'sThought Experiment of Radical Translation -- A Tension in Quine's Naturalistic Ontology of Semantics -- In Defense of Quine's Ostrich Nominalism -- Quinean Worlds: Possibilist Ontology in an Extensionalist Framework.