Heterogeneous autonomous agents from different manufacturers, organizations, or jurisdictions must coordinate in shared physical space without subordinating to a central authority and without revealing proprietary internal state. Mechanism design has historically proceeded under two assumptions that this setting violates: (i) agents report their types, and (ii) the mechanism evaluates outcomes through declared types alone. The Myerson-Satterthwaite (1983) impossibility result follows directly from those assumptions; under bilateral trade with quasi-linear utilities, no mechanism is simultaneously efficient, individually rational, budget-balanced, and strategy-proof. We study a structurally distinct setting in which (a) each agent emits only a lossy, bounded projection; a Minimum Viable Reality (MVR) into a shared state, (b) physical trajectories are observable ex-post and comparable against the MVR fields the agent declared, and (c) trust is a degradable scalar in 0,1 that weights an agent’s contribution to the convergence operator and is decayed by detected inconsistency. We make four formal contributions. First (Theorem 1), we define a Kinetically Blind Referee (KBR); an arbiter whose actions depend only on observable physical derivatives, never on declared intent and prove it detects spatial-envelope fraud in O(1) cycle. Second (Theorem 2), we prove that under MVR projection, physical verification, and degradable trust, truthful envelope projection is the unique strict best response against any one-shot deviation under any positive discount rate; the Myerson-Satterthwaite impossibility does not apply to this setting. Third (Theorem 3), we establish antifragility: the attacker’s cumulative payoff under iterated adversarial play decreases monotonically; we report empirical evidence under both a discrete-event cost function and a continuous-cost formulation, and discuss honestly why only the latter recovers the temporal signature the theorem predicts. Fourth (Theorem 4), we recast what prior work called “emergent axiom convergence” as architectural convergence: under the protocol architecture ( +KBR+ extended Integrity), Syncference agents are Axiom-compliant by construction, and deviations from compliance correlate strictly with deviations from protocol-respecting behavior. Empirically, 7,500 runs in MAZ3 v1.1.0 (commit fef3fc6) confirm the predicted signatures; raw data and plots are public. We position the work in the Hurwicz (1972) tradition of mechanism design, applied to a domain (real-time physical coordination with adversarial agents) that was outside the scope of his original framework. This work contributes foundational results to Perspectival Theory (alternatively, Sovereign Coordination Theory): the formal study of how sovereign agents coordinate through minimal revelation without surrendering internal state.
Adon Roche (Tue,) studied this question.