Abstract
It was 250 years ago that Immanuel Kant’s “Kritik der reinen Vernunft” was published first. Generations of philosophers regarded this work as the ne plus ultra in epistemology or metaphysics of knowledge. Since central parts of his doctrine can, to say the least, be considered to be incompatible with fundamentals in current physical theorizing, many philosophers have continued to explore his ideas. Some of them do so believing that Kant’s convictions have definitely been proved to be true and that therefore physical theories contradicting them are either flatly wrong or at least inadequately formulated; others try to reformulate his ideas in a way appropriate to provide a Letztbegründung for physical theories in general. Still others, and that includes the larger part of all the Kant researchers, are not interested mainly in these questions of truth but in all kinds of philological and historical questions concerning the position of his work in the flow of philosophical thinking.