Abstract

Kant’s manuscripts of 1796–1803, which the Academic German edition of his works combined in 21–22 volumes of under the invented by H. Vaihinger name ‘Opus postumum’, still attract the attention of researchers. Was there really a significant theoretical “gap” in the system of Kant's “critical”, transcendental philosophy, which built by 1790, needed to be filled, namely, to undertake a conceptual "transition" from the already constructed a priori metaphysics of corporeal nature (metaphysical principles of natural science) to experimental mathematical physics, to the entire scientific empirical investigation of nature? In the last years of his life Kant tried to solve a problem that was really decisive for the fate of transcendentalism, which he had already realized in ‘Critique of Pure Reason’ and concretized in ‘Metaphysical Foundations of Natural Science’, however he found himself in a hopeless situation, which doomed him to the “Tantalus’ torments”. The problem that he was constantly thinking about necessarily arises in the system of transcendental philosophy, but has no solution in it. ‘Opus postumum’ is an important piece of evidence on the insurmountable difficulties faced by the attempt to “save” philosophy as a perfect and complete system of absolutely reliable, "apodictic" science, based on the idea of universal and necessary conditions for the experience possibility.