There is a word in the language called marginal people, which comes from people's understanding of the edge. What is the edge? Intersection Zone. In political science, the frontier is a kind of fringe zone, and it is usually full of soldiers. Whether it is a state or an object, the collapse begins at the edge.

I don't know if you have noticed that the water in the bucket is still on the edge even after a person has scooped it. The second time it was like this, the third time it was like this. Keep going down to the bottom.

When the wood breaks, the forces exerted on the surface are transmitted to the center. And so, the center began to break. So, the wooden spines in the center are longer. However, the rupture of the center is not visible to us. Therefore, it is assumed that the fracture is from the outside to the inside. What is the reason for this? It turns out that this is not the edge. As long as it is not an edge, the force can be diffused in all directions. Why? We know that the direction of the force must be linear, but its transmission must be non-linear. More precisely, it is not directional, and the direction of the transmission can be changed at any time. Force can be transferred, and that's because there are voids inside the object. Even if it is a solid object, it still has voids inside. However, the voids are not as coherent as we think. Or rather, there are them in all directions, and they are zigzag. There are not many voids at the edge to withstand the force, so the force will inevitably collide with the object part. There is nowhere to get around the force but to pass through the object. Thus, the rupture was created. The void is determined by the density. The higher the density, the smaller the voids. Therefore, it is more difficult for the force to propagate. Theoretically, as long as an object has no edges, then the voids inside the object can be digested, no matter how much force the object is exerted. In my opinion, fracture is the deformation of an object due to the obstruction of the propagation of force. Of course, this is impossible. After all, any object will have edges. Theoretically, they are all capable of breaking. That being the case, reducing the edges is the best way to do it. However, edges are not real beings, but are dependent on objects like energy. It's hard to tell what the edge of a piece of glass looks like.

Why is it easy to tear plastic bags when there is a gap? It turned out that this was to increase the number of edges of the plastic bag. In this way, the transmission of force is blocked. As a result, the plastic bag is deformed.

Why do things always get cluttered? It turns out that it is related to the transmission of force. Force is the embodiment of energy. When objects become cluttered, they become more complex. A change in shape increases the number of edges, resulting in more energy being trapped by the object. Of course, the object becomes cluttered and not very fixed. This is because the object is trapping energy and does not want to consume too much of its own energy.

In geography, there is a kind of plain called the alluvial plain. There are two directions of transmission in the process of sea water movement, one is the center and the other is the edge. The center is not so easy to get to because of its location. However, the edge is all around, so most of the energy of the sea movement is completely lost at the edge. If seawater possesses infinite energy, then its edge must be infinite.

The flow of water against an object is determined by the object. This can happen, for example, when the soup pot is tilted downward. Why? This is the edge effect of the fluid as it changes direction. Since the edges are redirectionous, the fluid is faced with a choice. Due to the proportions of the shape of the soup basin, the fluid flows down the outer wall of the container as it flows downward. There are two reasons for this phenomenon, one of which is that fluids tend not to change the direction of motion. Rounded sides are the second of them. If it is not round or curved, there is no adhesion flow.

After hearing this, the three of them were silent. Since this was Mizukawa's own unique opinion, they had no choice but to agree. When the video ended, the three of them discussed it again.