This work is concerned with the Refutation of idealism proposed by Kant in the Critique of Pure Reason, where we intend, initially, through a critical and conceptual analysis that the subject demands, to address the questions that Kant raises against skeptical idealism, and also, to position ourselves as to the sufficiency of the proof proposed by Kant as a solution to the problem of the real existence of objects outside consciousness, both in the Fourth paralogism (edition A) and in the Refutation of idealism (edition B). Later we will show that the arguments of the Fourth paralogism of the A edition together with the Refutation of the idealism of the B edition are sufficient for the refutation of the skeptic and finally prove the ...