Day before yesterday while playing Mahjong Titans on windows at my friend Susmits place, one thing came to mind: the problematic Tile matching process of the game was quite similar to the problematic. Rahu Ketu always came in pairs: Problems/ solutions, and often the problem of One would lie in the Solution of the other. If Rahu was your problem, Ketu was your solution, and Vice versa. Infrared and Ultraviolet, Heads and Tails, two sides of the same coin. Like in Mahjong, problematic PAIRS of the same symbols. The very heart of deconstruction itself..
