stage for his broader philosophical arguments. The opening of "Prolegomena" introduces the necessity of questioning metaphysics and highlights its historical challenges, particularly through the skepticism introduced by David Hume. Kant argues that human reason must first determine whether metaphysics can be a valid science, discussing how pure a priori knowledge is formed and linking it to concepts of understanding and intuition. He posits that for metaphysical knowledge to exist, it must not rely on empirical observation but instead derive from the innate structures of human cognition. Kant's exploration at the beginning of this discussion sets the groundwork for understanding the nature of knowledge, drawing a critical line between empirical sciences and metaphysical reasoning. (This is an automatically generated summary.)