It is my intention in these lectures to present a few fundamental considerations toward a phenomenological logic. By the word "logic" I do not understand a subordinated, theoretical, and normative special science in the sense that it is usually taken 10 today, even, say, in the sense in which the modern mathematician has shaped logic as a special mathematical discipline. Logic in the full and universal sense, the sense that we will have in view, is the science that consciously reappropriates the task that was enjoined to logic in general from its historical origin in the Platonic 15 dialectic: namely, the task to be a universal theory of science, and at the same time, a theory of science in principle. A theory of science in principle signifies a science that is in principle a science of all sciences as such.