Joseph 1. Kockelmans Pennsylvania State University In July of 1999, Prof. Dr. Thomas M. Seebohm turned 65 years old, and thus en tered mandatory retirement. His friends, colleagues, and former students thought that it would be fitting to celebrate the event of his retirement with a volume of essays in his honor, in order to render homage to a great human being, an outstanding and dedicated teacher, a highly regarded philosopher and scholar, but above all a dear friend and colleague. When the editors thought about a unifying theme for the anthology, they finally settled on the research interests of Professor Seebohm; in their view the vast do main of his competence and interests would leave all participants the freedom to select a topic of their own choice that would nonetheless lie within this large realm as well as within the area of their own research interests. Professor Seebohm's research interests encompass work in Phenomenology, Hermeneutics, German Idealism (Kant in particular), History of Philosophy, Phi losophy of the formal sciences (of Logic in particular), Philosophy of History, Methodology and Philosophy of the Human Sciences, (including Psychology and Sociology), History of 19th Century British Empiricism (Mill), American Pragma tism, Analytic Philosophy, Philosophy of Law and Practical Philosophy, the devel opment of the history of philosophy in Eastern Europe, especially in the Middle Ages, but also in the nineteenth century."

Joseph 1. Kockelmans Pennsylvania State University In July of 1999, Prof. Dr. Thomas M. Seebohm turned 65 years old, and thus en tered mandatory retirement. His friends, colleagues, and former students thought that it would be fitting to celebrate the event of his retirement with a volume of essays in his honor, in order to render homage to a great human being, an outstanding and dedicated teacher, a highly regarded philosopher and scholar, but above all a dear friend and colleague. When the editors thought about a unifying theme for the anthology, they finally settled on the research interests of Professor Seebohm; in their view the vast do main of his competence and interests would leave all participants the freedom to select a topic of their own choice that would nonetheless lie within this large realm as well as within the area of their own research interests. Professor Seebohm's research interests encompass work in Phenomenology, Hermeneutics, German Idealism (Kant in particular), History of Philosophy, Phi losophy of the formal sciences (of Logic in particular), Philosophy of History, Methodology and Philosophy of the Human Sciences, (including Psychology and Sociology), History of 19th Century British Empiricism (Mill), American Pragma tism, Analytic Philosophy, Philosophy of Law and Practical Philosophy, the devel opment of the history of philosophy in Eastern Europe, especially in the Middle Ages, but also in the nineteenth century."

Das Buch beabsichtigt, mit den Mitteln einer phanomenologischen Semantik, einen Beitrag zum Verstandnis der Modallogik und ihrer philosophischen Implikationen zu liefern. Es richtet sich in erster Linie an Phanomenologen, aber auch an analytische Philosophen und an philosophisch interessierte Logiker.
Bereits im vorigen Jahrhundert begannen Mathematik und Logik, sich zu abstrakten Wissenschaften zu entwickeln. Husserl nannte die schliesslich resultierende Einheit beider Mathesis Universalis'. Diese bildet nicht nur den Boden aus dem Husserls philosophische Arbeit erwuchs, sondern auch den Rahmen, in den die moderne Modallogik zu stellen ist. Als abstrakte Disziplin der Mathesis Universalis erfordert ihre phanomenologische Aufklarung detaillierte Analysen der Genese von Modalisierung, die weit in die kognitiven Strukturen von (vorsprachlicher) Wahrnehmung hineinreichen. Das so gewonnene Verstandnis von Modalisierung erbringt ein zweifaches Resultat: Zum einen kann die insbesondere im Rahmen der analytischen Philosophie gefuhrte Diskussion der erkenntnistheoretischen und ontologischen Schwierigkeiten der Modallogik eine phanomenologische Aufklarung erfahren. Zum anderen erlaubt die Tatsache, dass der "Beweisbegriff" als mathematische Modalitat zu verstehen ist, eine prazise phanomenologische Bestimmung des Verhaltnisses von formaler Logik und Mathematik."