Invited Papers. Karl Menger: Language and Mathematics/ Patrick Suppes: Procedural Semantics/ David Wiggins: Truth and Interpretation/ Roderick M. Chisholm: On the Meaning of Proper Names/ Jules Vuillemin: Is homo currit Identical with hono est currens?/ Jaakko Hintikka: Degress and Dimensions of Intentionality/ John R. Searle: The Intentionality of Intention and Action/ Hilary Putnam: How to Be an Internal Realist and a Transcendental Idealist (at the Same Time)/ Guido Küng: What Do We 'See' When We Register a Fact?/ Marian Przelecki: Set Theory as an Ontology for Semantics/ Werner Leinfellner: Grundtypen der Ontologie/ Kuno Lorenz: A Pragmatic Foundation for the Distinction of Symbols from Symptoms/ Eike von Savigny: Sprachspielinteressen/ János S. Petöfi: Written, Spoken, and Face-to-Face Communicaiton: Some Philosophical Aspects of the Investigation of Natural Language/ Irena Bellert and Paul Weingartner: Scientific and Everday Language Texts/ Section Papers. I.Wittgenstein. 1.Wittgenstein's Philosophyin Its Historical Context/ 2.Logic and Semantics of the Tractatus/ 3.Wittgenstein, the Vienna Circle, and the Philosophy of Science/ .....