Insight Without Sovereignty: A Control-Theoretic Formalization of Intrusion (I)

Structural Intelligence SI distinguishes cheap coherence from contact and defines intelligence as answerable revision under constraint. Yet a persistent anomaly remains. Individuals can achieve high insight and even substantial contact while staying trapped in replay, projection, identity fog, and internal prosecution. This paper introduces a missing variable that completes the dynamics: Intrusion I, defined as Foreign Agency Load, the degree to which attention and action selection are occupied by a self-sustaining control loop that behaves phenomenologically as not me. I formalize presence as a stability regime of the agent environment feedback loop. I model Intrusion as occupancy mixture control and as a disturbance that increases Latency L and Actorhood A while reducing effective Pilot access ω. I integrate Intrusion into a complete Presence Equation consistent with the SI corpus. I then derive operational diagnostics, a five-step intervention sequence, and testable predictions. Finally, I discuss implications for AI ethics in cheap coherence environments.