Thomas A. Fay Heidegger and the Formalization of Thought 1 Dagfinn F011esdal The Justification of Logic and Mathematics in Husserl’s Phenomenology 25 Guillermo E. Rosado Haddock On Husserl’s Distinction between State of Affairs (Sachverhalt) and Situation of Affairs (Sachlage) …35 David Woodruff Smith On Situations and States of Affairs 49 Charles W. Harvey, Jaakko Hintikka Modalization and Modalities …59 Gilbert T. Null Remarks on Modalization and Modalities 79 J. N. Mohanty Husserl’s Formalism 93 Carl J. Posy Mathematics as a Transcendental Science 107 vi Gian-carlo Rota Mathematics and the Task of Phenomenology 133 John Scalon Tertium Non Datur: Husserl’s Conception of a Definite Multiplicity …139 Thomas M. Seebohm Psychologism Revisited 149 Gerald J. Massey Some Reflections on Psychologism 183 Robert S. Tragesser How Mathematical Foundation all but come about: A Report on Studies Toward a Phenomenological Critique of Godel’s Views on Mathematical Intuition. . 195 Kenneth L. Manders On Geometric Intentionality 215 Dallas Willard Sentences which are True in Virtue of their Color …225 John J. Drummond Willard and Husserl on Logical Form 243 Index of Names 257 Index of Subjects 259 PREFACE The phenomenology of logic and ideal objects is the topic of Husserl’s Logical Investigations. This book determined the early development of the so called phenomenological movement. It is still the main source for many phenomenologists, even if they disagree with Husserl’s transcendental turn and developed other phenomenological positions or positions beyond phenomenology he early sense.