Husserl’s Ideas on a Pure Phenomenology and on a Phenomenological Philosophy Edmund Husserl (1859-1938) was a German philosopher who was born in Prossnitz, Moravia. He taught philosophy at the universities of Halle, GÜttingen, and Freiburg. Martin Heidegger (1889-1976) was among his students and succeeded him as professor of philosophy at Freiburg after his retirement. Husserl had an important influence on Heidegger, on existential phenomenology, and on the philosophy of mind. Ideas: General Introduction to Pure Phenomenology (1931) defines phenomenology as a descriptive analysis of the essence of pure consciousness. Husserl defines pure or transcendental phenomenology as an a priori (or eidectic) science (a science of essential being). He distinguishes between pure phenomenology and empirical psychology (and between transcendental and psychological subjectivity), saying that phenomenology is a science of essences, while psychology is a science of the facts of experience. He criticizes "psychologism" (the theory that psychological analysis may be used as a method of resolving philosophical problems), and he says that only an a priori science can define the essential nature of being. The Ideas are divided into four sections: (1) "The Nature and Knowledge of Essential Being," (2) "The Fundamental Phenomenological Outlook," (3) "Procedure of Pure Phenomenology In Respect of Methods and Problems," and (4) "Reason and Reality." The first section describes how the realm of essence differs from the realm of facts. The second section describes how phenomenological reduction may be used as a method of philosophical inquiry. The third section describes how noesis and noema may be defined as phases of intentionality. The fourth section describes the relation between consciousness and noematic meaning. Husserl distinguishes between phenomenology as a science of pure consciousness and psychology as a science of empirical facts. For Husserl, the realm of pure consciousness is distinct from the realm