This paper introduces The Diamond Core as a counterfeit detector for the age of cheap coherence. In environments where coherence internally consistent narrative closure is abundant and contact constraint-bearing feedback: time, contradiction, cost, repair, consequence is delayed, people learn to finance identity through maintenance ongoing cost of holding a coherent pose, often accumulating maintenance debt maintenance financed with energy you do not actually have until forced contact arrives as burnout, betrayal, drift, or collapse. The Diamond Core is defined as invariance a non-negotiable internal constant revealed under pressure: what remains true when comfort, belonging, and narrative advantages are removed. The paper operationalizes reality-contact through five tests - cost, witness/trace, option-closed (irreversibility), repair, and time - plus falsifiers that expose coherence theater. It adds a terrain-based trace audit (would the change remain if no one could see it) and emphasizes contact anchors as external "No's" that make binding survivable. The result is a practical instrument: not a belief system, but a method for converting insight into binding revision that becomes observable and constraint-coupled and for distinguishing real change from narrative substitution.
Vladisav Jovanovic (Thu,) studied this question.