Iceboats attain speeds of 60 miles per hour in a direction at right angles to wind blowing at half that speed. These results are all precessional. The minialtitude tetrahedron seen as a flattened triangle has a synergetic surprise behavior akin to precession. We can flip one simple white triangle over and find that the other side is black. 1013.13 Polarity is inherent in congruence.
Every sphere has a concave inside and a convex outside.
1013.15 Unity is plural and at minimum two. Unity does not mean the number one. One does not and cannot exist by itself. In Universe life's existence begins with awareness. The observed requires an observer.