Logic

Cover

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Title Page, List of Editors, Copyright Page

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pp. i-iv

Contents

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pp. v-vii

Translator’s Foreword

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pp. ix-xi

Martin Heidegger delivered the fifty-three lectures titled “Logic: The Question of Truth,” four days a week from Thursday, 5 November 1925, to Friday, 26 February 1926, at Philipps-Universität in Marburg. It was during the span of this lecture-course that the dean of the philosophy faculty walked into Heidegger’s office and told him, “You must...

Introduction

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pp. 1-24

We begin our treatment with a preliminary understanding of what the word “logic” means in its most direct and literal sense. The terms “logic,” “physics,” and “ethics” come from the Greek words λογική, φυσική, ἠθική, to which ἐπιστήμη is always to be added. Ἐπιστήμη means roughly the same as the German term...

Prolegomenon

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pp. 25-103

Logical Investigations grew out of efforts to provide philosophical clarity to pure mathematics. Husserl, who originally was a mathematician, was led to some principled considerations about the basic concepts and laws of mathematics, and as he said, he soon realized that logic in our day fell short of being an actual science and thus that the fundamental...

Part I

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pp. 105-164

[127] As we now discuss this question with a glance back to some texts of Aristotle, it does not mean that we are trying to give a complete interpretation of those texts. Let’s presuppose such an interpretation as having already been carried out. Then, using our guiding question, let us simply focus on some individual theses of Aristotle...

Part II

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pp. 165-343

The conclusion that we have drawn is also an enigma.¹ In other words, the conclusion of the preceding analyses has brought us, intentionally and radically, to the central problematic of philosophy. The conclusion of the investigation up to this point is not an end but a beginning. So what does it mean that we now take the preceding investigation and the phenomena we have articulated—statement, truth, falsehood,...

Editor’s Afterword

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pp. 345-346

Martin Heidegger held his four-hour-per-week lecture course on logic in the Winter Semester of 1925–26 in Marburg am Lahn. The original plan (cf. §5) was changed as the course was worked out. In contrast to traditional logic, Heidegger poses a philosophizing logic that inquires into λόγος: a logic of truth. In the prologue he investigates the situation of present-day logic,...

Glossaries

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pp. 347-354

Abbreviations

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pp. 355-356