The realms of the framework — and the conformal space Penrose's geometry says they fit into. The same structure, read two ways.
core → edge
The honest break: Penrose's cosmos is observer-free. The +1 — the observer — is ours to add, not his gap. We don't complete him; we bring an observer to a shared skeleton. The whole nesting as a Carter–Penrose compactification is our reading — reaching, not physics.