His main point of argument was that reason cannot produce theoretical knowledge of something that cannot experience though our sense or understanding. In his writing Critique of Metaphysics, Kant argues that it is not possible to gain knowledge of something which we cannot experience through our sense because our sense have limits (Daniel Kolak 2006). According to Kant reason is something which requires explanation of everything and synthetic a priori truth is something which cannot be denied, such as “2+2=4” is synthetic a priori
