There is always a minimum level of differences which humans can recognize in order to differentiate two things. Beyond that point, the differences are not distinguishable. The immediate moment of finding the minimum different enough details is the basic concept of this piece. In other words, the outline and macro structure of the music materials are the most identical but insufficient for the listener to hear the similarity, even in some sections where all instruments have the exact same material. Due to the nature of the notation design, and the approximation in the performance details, even the same musical material with the "maximum identical outlines" are "insufficient" to hear the perfect similarity, even though they are perfectly similar is some sections.