On the Circular Demonstration Between Philosophy and the Possibility of Science——From the Perspective of Kant's Critique of Pure Reason

The possibility of science requires philosophy to demonstrate it by the way of epistemology; at the same time,philosophy also requires the possibility of science to demonstrate its validity.In Critique of Pure Reason,Kant not only demonstrates the possibilities of pure mathematics and pure natural science by his philosophy of critique of pure reason,but also demonstrates his philosophy of critique of pure reason by the possibilities of pure mathematics and pure natural science.The demonstration is circular.But we can't think it as valueless when we are doubtful of its validity, because it targets the relation between human's knowledge and freedom and it also reveals an interesting strain among philosophy,science and logic.