What, according to Kant, is the legitimate domain of our knowledge claims? (See description for the complete question)

Essay Question: In the A Preface, Kant is largely concerned with setting the context for and presenting the central argument of the critique of Pure Reason. For example, Kant lays out the object of critique: Yet by this [critique of pure reason] I do not understand a critique of books and systems, but a critique of the faculty of reason in general, in respect of all the cognitions after which reason might strive independently of all experience, and hence the decision about the possibility or impossibility of a metaphysics in general, and the determination of its sources, as well as its extent and boundaries, all, however, from principles.” (A xii; p. 101) What, according to Kant, is the legitimate domain of our knowledge claims? *Relevant excerpt: A Preface (A vii-xxii/pp. 99-105) Only need to read preface A*Consider teaching your reader about how pure reason (think about one, and only one, of the following: Descartes, Spinoza, or Leibniz) cannot, on Kant’s account, be the sole source of knowledge. More specifically, why reason ‘falls into error’ when it seeks the ultimate conditions of reality, e.g., “the necessity of a first beginning of the world.” (A xiv)Instructions and Advice: Your essay will serve as a tutorial: 1. Describe important concepts and lines of reasoning, e.g., ‘He says this, he argues that.’ 2. Explain important concepts and lines of reasoning, e.g., ‘This is what he means by this and that.’ 3. Connect important concepts and lines of reasoning to your thesis, e.g., ‘So, this is why…’ 4. Be sure your essay is fully formed, i.e., introductory remarks, summaries, and analyses. When formulating your position, be sure to make your argument clear. 5. Organize your thoughts so they are expressed on paper as a coherent whole. Given the constraints of the exam format, you’ll probably write a minimum of four and a maximum of six paragraphs. These should ‘hang together’ in a way that’s easy to follow; there is a clear progression of ideas. In addition, DO NOT use material from any outside (i.e., secondary) sources, and do not use quotes from the primary source material longer than several words; I want to read what you have to say about the text. When you do quote the text, however, be sure to enlist the appropriate punctuation. Your essay should run between 1000 and 1200 words. Be sure not to quote the text. Instead, make references to the relevant sentences or passages you will discuss. Avoid relying on secondary sources and keep direct quotes from the primary text brief, incorporating them properly into your writing. The essay should be your interpretation and analysis, not a summary or paraphrase of other materials. The goal is to demonstrate your understanding of the primary text through thoughtful discussion. Carefully choose your words to construct ideas that guide the reader. Focus the essay on a central argument or point, using concepts and arguments from your primary thinker(s) as evidence to support your claims. Clearly present and explain significant concepts and how they relate to your central idea.
*The KANT PDF consists of both the A and B Prefaces, but you only need to read preface A
*The attached outline and Key Terms is useful for completing this essay.