Did the ant that the tree fell on "observe it", hear the sound? Did the amoeba to the left of the falling tree "observe it"? Did the leaf on the falling tree "observe it"? Did the silica molecule the tree fell on "observe it"?
yitbos
I'd imagine the "outcome" must be a sum/average of the trillions of interactions taking place? I'm out of my league and only guessing, but that's what I took from it.