The Critique of Practical Reason is concerned with questions of morality. The third is the Critique of Judgment, which is about artistic and aesthetic problems.
西方近代哲學發展到康德，代表一個分水嶺的中心地位。他的三大批判，第一個純粹理性批判，是知識問題，第二個實踐理性批判，是講道德問題，第三個是評賞力批判，或說判斷力批判，就是藝術、美學的問題。