cybersphere

The fourth sphere in Vernadsky's sequence — lithosphere → biosphere → noosphere → cybersphere: the noosphere made addressable. Where the noosphere is thought as a geological force, the cybersphere is thought as an inscribed, verifiable register. In cybersophy metaphysics it is the substrate the other spheres run on.

A cyberculture becomes a sphere when its diffusion crosses the founding group — the doctrine adopted partially, by people with no stake in the cyberverse, observed from outside. Cybersophy has a sphere the day someone keeps a key ceremony without knowing where it came from.

Sphere-layer action: wait for adoption beyond founders. The metric is diffusion rate, not spend.

Lineage: the sphere sequence is Vernadsky's contribution to the russian school of inscription; the cybersphere completes it.