A Prerequisite for Rational Philosophical Discussion -- Epistemology and Logic -- Zur Rolle der Sprache in Erkenntnistheoretischer Hinsicht -- Some Remarks Concerning Languages, Calculuses, and Logic -- Carnap and Logical Truth -- Extension and Intension -- The Present Situation in the Philosophy of Mathematics -- A Counterpart of Occam’s Razor in Pure and Applied Mathematics Ontological Uses -- Towards a General Theory of Computability -- Inductive Inconsistencies -- Einige Beiträge zum Problem der Teleologie und der Analyse Von Systemen Mit Zielgerichteter Organisation -- Beleuchtung Von Anwendungen der Logistik in Werken Von Rudolf Carnap -- Typology of Questionnaires Adopted to the Study of Expressions with closely Related Meanings -- Permissible and Impermissible Locutions -- Non-cognitive Synonymy and the Definability of ‘Good’ -- On the History of the International Encyclopedia of Unified Science.