Sometimes you need to combine different perspectives and observations to get a clear picture of the system and it’s mechanisms. This is called emergence. This principle is nicely illustrated in parable of the elephant and six blindfolded people. These people are asked to touch the elephant and describe what they think it is. One says a "snake" (trunk), the second one says a "wall" (the elephant side), the third one says a "tree"(leg), the forth one says a "spear" (tusk), the fifth a "rope" (the tail) and the last one says a "fan" (ear). No one describes any part of the elephant, but by exchanging their observations, the elephant "emerges".