The discovery against logical reality which is familiar with our customary truth gives us unconventional impression and the novelty. This changes our ordinary life. When it is positive, we skim off the prejudice and perceive it as a truth. This challenge of the truth tries a door to the infinite possibility of communication which broadens a wide range of the truth and open a new prospect. 11root2 is symbolic of the idea of this season. It was the epoch-making discovery about that time the integer was the absolute truth for centuries.