Read the following passage carefully and answer the questions that follow in your own words: Immanuel Kant, a prominent figure in modern philosophy, proposed a unique framework for understanding knowledge, ethics, and the nature of reality. Central to his philosophy is the concept of transcendental idealism, which distinguishes between the noumenal and phenomenal realms. According to Kant, the noumenal realm represents things as they are in themselves, independent of our perceptions. However, because we are limited to our sensory experiences, we can only access the phenomenal realm, which comprises our subjective perceptions and interpretations of the world. Kant argues that our knowledge is not solely determined by external reality but is shaped by the interaction between our cognitive faculties and the raw data provided by our senses. Furthermore, Kant introduced the notion of synthetic a priori knowledge, which refers to propositions that are both informative and necessarily true, yet not derived solely from experience. He posited that certain fundamental principles and concepts, such as the principles of mathematics and causality, are necessary for coherent thought and meaningful experience. These principles are not derived from observation but are inherent in the structure of human cognition. In the realm of ethics, Kant developed the concept of moral autonomy and the categorical imperative. He believed that moral actions must be guided by universal moral principles that can be applied to all rational beings without contradiction. According to Kant, moral worth lies in acting out of a sense of duty and respect for rationality, rather than pursuing personal desires or consequences. For Kant, the moral law is derived from reason itself and is independent of any specific cultural or religious context. Kant's philosophical ideas have had a profound impact on various fields, from epistemology to ethics, and continue to shape philosophical discourse to this day.