Human: Could you give me a 10 minute summary of Kant's "Critique of Pure Reason"? Assistant: 
Immanuel Kant's Critique of Pure Reason is often considered one of the most influential philosophical works of all time. It is divided into two main sections, the "A" and "B" editions, and attempts to critique the existing knowledge of the natural sciences and metaphysics. Kant argues that we gain knowledge through the senses, but that it is limited by the conditions of space and time, as well as the nature of the human faculties of understanding. He then explores the categories of understanding which organizes and structures our experience, and examines arguments for and against the existence of God, freedom and immortality of the soul. In the "B" edition, Kant turns his attention to a refutation of idealism, which he sees as leading to skepticism and ultimately refute all possible knowledge. He postulates the idea of transcendental idealism, which claims that all knowledge of the world relies on the mind's own structures and systems of understanding. Kant's criticism serves to remind us of the limit of our ability to understand the world, and suggests that knowledge is not accessible through pure reason, but only by experience. He thus concludes that we can only know the world as it appears to us, and can never access the world as it really is.