This text analyzes the concept of the transcendental within the context of the history of philosophy, particularly in relation to the teachings of Immanuel Kant, John Locke, and G. W. Leibniz. The author reflects on the nature of human experience, concluding that besides sensory data, there must be a non-empirical component—the intellect—that processes this data. The core of the argument is a critique of identifying a priori forms of knowledge with universal validity. While the existence of a priori moments is necessary for the emergence of conscious experience, the author does not consider their validity to be pre-determined. Instead, he proposes viewing a priori elements as hypothetical constructs that are introduced into the cognitive process "on trial" and only retrospectively gain legitimacy. In this way, the rigidity of Kantian categories is challenged, emphasizing the creative and dynamic nature of human reason, which actively, though initially tentatively, creates its own tools for understanding the world.