Post-Horizon Dynamics: Cognitive Organization After the Event Horizon

This paper examines cognitive organization after the crossing of a cognitive event horizon. The event horizon is treated not as a transient anomaly but as a structural phase transition that establishes a new normative regime of cognition. The analysis is explicitly post-transitional: the horizon is assumed to have been crossed, and attention is directed toward the regulatory, organizational, and learning-related properties that characterize cognition beyond it. Building on prior work that identifies high-level cognition with temporally stabilized integrated abstract structures, the paper clarifies how regulation, flexibility, irreversibility, problem solving, and learning differ in post-horizon regimes. Particular emphasis is placed on distinguishing rigid elimination from dynamic constraint formation, introducing the concepts of latent parallelism and dynamic priority hierarchies. The account remains structural and non-phenomenological, avoiding appeals to consciousness, intention, or experience except where structurally unavoidable. Post-horizon cognition is shown to constitute a distinct normative regime whose dynamics cannot be reduced to either pre-horizon exploration or incremental learning.