§ 26. The table of the Universal Principles of Natural Science is perfect and complete. Its principles are limited only to possible experience. The principle of the axioms of intuition states that appearances in space and time are thought of as quantitative, having extensive magnitude. The principle of the anticipations of perception states that an appearance's sensed reality has degree, or intensive magnitude. The principles of the analogies of experience state that perceptual appearances, not things in themselves, are thought of as experienced objects, in accordance with "a priori" rules of the understanding.