Touch and thought run on the same perceptual machinery, but you get two different felt assignments: the world on your hand, the operator in your head. You can’t even get close to thinking with an elbow. That asymmetry should unsettle you more than it does.

Brains compress the world into layers and rank, then route attention upward, so local noise gets summarized before it reaches a decision. That is why pyramid-like groups feel obvious: a few signals at the top, many roles below, a ladder everyone can read. Hierarchy is an attractor: groups keep sliding into a pyramid. Flatter systems need counter-design (written rules and shared maps), because the nervous system is already used to climbing.