1. Trust is high, enforcement has atrophied (μ has eroded E toward E₀).
2. High trust + low enforcement ⇒ deception is highly profitable ⇒ **D rises**.
3. Rising D depletes trust **and** — with a *lag* — mobilizes enforcement (αD).
4. Enforcement E climbs; deception's effective payoff $\gamma T - E$ turns negative ⇒ **D collapses**.
5. With D low, mobilization stops; enforcement **atrophies** back toward E₀; trust regenerates.
6. Return to step 1.