Kantianism
Kantianism is the philosophy of Immanuel Kant, a German philosopher born in Königsberg, Prussia (now Kaliningrad, Russia). The term "Kantianism" or "Kantian" is sometimes also used to describe contemporary positions in philosophy of mind, epistemology, and ethics.
Hans Vaihinger
Hans Vaihinger (; September 25, 1852 – December 18, 1933) was a German philosopher, best known as a Kant scholar and for his "Die Philosophie des Als Ob" ("The Philosophy of 'As if'"), published in 1911 although its statement of basic principles had been written more than thirty years earlier.