The organizational condition in which schema entropy rate is positive — entity signal construction outpaces infrastructure decay. Defended posture is not a permanent state but a continuously maintained condition. An organization in defended posture experiences compounding advantages: each quarter’s maintenance strengthens the foundation for the next quarter’s gains. Defended posture is operationalized as positive quarterly delta in corroboration signals, parametric recall rate, and citation coverage across all active sovereignty perimeters. Defended posture is the goal state; cognitive equilibrium is the maintenance requirement that sustains it.