Description: The bifurcation diagram for the logistic map is one of the most intriguing fractals in all of non-linear dynamics. Produced from a simple quadratic iterative scheme, it contains within itself windows of chaos and infinite self-similarity. It also looks quite a bit like a tree! Thus I took some liberties and created this colorful logistic tree which holds the essence of the original diagram while branching out to meet its natural cohort. You'll want to choose a light colored shirt for this one.
Description: "Not one, not two" is a Zen expression and therefore deliberately confounding. I see "not two" is a rejection of dualism, a rejection of the concepts of "self" and "other", and "not one" as a relinquishing of self and the clinging to the concepts of "not two". Your mileage may vary, of course. Zen is beyond all words, but it's fun to try.