This philosopher, who critiqued the work of Kant using the concept of "thing-in-itself," was highly influenced by the Upanishads.
This thinker described colors as coming in three pairs of opposing ones in On Vision and Colors. "Make Your Opponent Angry" is one of the 38 stratagems for winning a debate listed by this man in his work The Art of Being Right. This man described the four classes of sufficient reason in his doctoral dissertation. This philosopher, who critiqued the work of Kant using the concept of "thing-in-itself," was highly influenced by the Upanishads. For 10 points, name this German author who wrote The World as Will and Representation.
This thinker described colors as coming in three pairs of opposing ones in On Vision and Colors.
Arthur Schopenhauer