Kant's Theory of Knowledge and its Inherent Contradiction: examining the Kant's theory of knowledge based on Kant's own criterion in formation of knowledge

In his theory of knowledge, Kant presents an exclusive method for obtaining science by applying categories to the data of sensory intuition. "A priori synthetic propositions" are those the only the product of the application of categories to the data of sensory intuition, Propositions that are Kant's exclusive criterion in diagnosing science. Kant claims that only the sciences that have a priori synthetic propositions, which necessarily have sensory intuition data are science, and propositions that do not have sensual intuition data are nothing more than fake science. With the same reasoning, he pushed metaphysics out of science. Accordingly, the attempt of this paper is to measure Kant's theory of knowledge with his own criterion of knowledge. We want to know whether it has a priori synthetic propositions or not. To be more precise, do the propositions through which Kant explained his theory of knowledge, contain sensory intuition data or not? If they have these data, they are science, otherwise, they are not. The investigations carried out in this article, which focuses on Kant's important and key propositions in transcendental aesthetic and Transcendental analytic, show that these propositions, which define and explain the basis of Kant's theory of knowledge, lack sensory intuition data and are not science. Eventually, Kant's "theory of knowledge" is not able to obtain the accreditation it wants and according to Kant's own theory of knowledge, it is not a valid science.