The annual colloquium of the SIEPM in Freiburg, Germany, was groundbreaking in that it featured a more or less equal number of talks on all three medieval cultures that contributed to the formation of Western philosophical thought, the Islamic, Jewish, and Christian traditions. Indeed, the subject of the colloquium, ‘The Origin and Nature of Language and Logic in Medieval Islamic, Jewish, and Christian Thought’, lent itself to such a cross-cultural approach. In all these traditions, partially inspired by ancient Greek philosophy, partially by other sources, language and thought, semantics and logic occupied a central place. As a result, the chapters of the present volume effortlessly traverse philosophical, religious, cultural, and linguistic boundaries and thus in many respects open up new perspectives. It should not be surprising if readers delight in chapters of a philosophical tradition outside of their own as much as they do in those in their area of expertise. Among the topics discussed are the significance of language for logic; the origin of language: inspiration or convention; imposition or coinage; the existence of an original language; the correctness of language; divine discourse; animal language; the meaningfulness of animal sounds; music as communication; the scope of dialectical disputation; the relation between rhetoric and demonstration; the place of logic and rhetoric in theology; the limits of human knowledge; the meaning of categories; the problem of metaphysical entailment; the need to disentangle the metaphysical implications of language; the quantification of predicates; and the significance of linguistic custom for judging logical propositions.