 The Yogācāra Buddhists’ best argument for their subjectivism—which one suspects derives more fundamentally from a commitment to the possibility of a universal nirvāṇa experience, although this is not said—is perceptual illusion. Illusion proves that a perception’s object is not a feature of the world but is contributed somehow from the side of the subject. A rope can be perceived as a snake, with no difference, from the perspective of the perceiver, between the illusion and a veridical snake perception. Similarly, dreams are the “perceptions” of a dreamer but do not touch reality. (Our world is a dream, say Buddhists, and we should try to become buddha, “Awakened.”)