# Black Mirror S4E2 — Arkangel **Decoherence bridge:** Arkangel and William's AR treatment cross the same root boundary from observation into cognitive write access. [[wiki/Model-Subject Boundary|Model-Subject Boundary]] asks whether the operator may alter perception merely because the operator can sense, classify or claim care for the subject. **Case Family:** Neural and Perceptual Sovereignty / Custody **Case Status:** Load-Bearing **Related:** [[Black Mirror]], [[Black Mirror Episodes]], [[Perceptual Sovereignty]], [[Read-Write Separation]], [[Creator-Creation Asymmetry]] --- ## Case Arkangel gives a parent continuous surveillance over a child and the ability to filter disturbing perception. The architecture crosses from observation into authorship: custody becomes control over what the developing person is allowed to experience. Parental authority can justify protection and limited monitoring without granting permanent root access to another person's sensorium. The child's changing competence also means that consent and control cannot remain frozen at the moment of installation. ## Constitutional Questions - When must custodial access diminish as the child develops autonomy? - Does authority to monitor include authority to suppress perception? - What removal and repair duties follow from installing an identity-shaping interface? ## Key Insight **Custodial responsibility does not confer sovereignty over the perceptual world from which another self develops.** ## See Also [[Ring Zero]], [[Ownership of Mind]], [[Exit Rights]], [[Brain-Computer Interfaces]], [[Black Mirror S3E5 — Men Against Fire]] ## Sources / Provenance - Primary fictional source: _Black Mirror_, S4E2, “Arkangel.”