The shape of a family that doesn't leak to advertisers.
4 vertices · 6 edges · no central hub
Most platforms force a star: the platform sits at the center, every relationship passes through it.
P31 is K₄: every member touches every other member directly. Six edges. Zero hubs.
What this means in practice
rg "k4PersonalWorkerUrl" p31-constants.jsonMath, briefly
K4 is the complete graph on 4 vertices. Edges = C(4,2) = 6. Symmetric, no privileged node, every relationship one hop away.
It is also the tetrahedron, the simplest 3D Platonic solid — geometry that exists whether or not we name it.