Ursa Minor hosts a kinematically cold secondary density peak that has survived many crossing times, when a cuspy halo's tides should have sheared it apart and the predicted subhalo population should have heated what remained (Kleyna 2003; Pace 2014). N-body work demands a nearly harmonic core for its survival, exactly what cuspy CDM simulations refuse to supply (Lora 2012).
The model's dwarf potentials are cuspy and busy: a steep central gradient that shears cold structures and a swarm of subhalos that stirs them. A fragile clump surviving a Hubble time indicts both features at once, and the rescue, a large constant-density core, is the core-cusp concession arriving through yet another door.
SCT's dwarf potential is exactly the harbor the clump requires. The gravitating mass is amplified baryons, Φ_eff = Φ_local + Φ_mesh, and the mesh term is smooth and gentle in the center by construction (P50, P52), the nearly harmonic core the N-body rescue demands, delivered as the mechanism's native shape rather than a tuned exception, the same profile carrying Sculptor (recid 143) and the dwarf sector at large (recid 127). And the potential is quiet as well as soft: no dark subhalos exist to stir the clump (P54), the same registered silence the cold stellar streams testify to (recid 136). Shear and harassment, the two clump-killers, are both absent for one reason.
The clump's existence has a natural source on the same ledger: deposited debris carries inherited substructure (P25, P31), so a dwarf condensing from a heterogeneous fragment can be born with secondary concentrations that the quiet mesh potential then preserves indefinitely. What ΛCDM must read as an improbable survivor, SCT reads as ordinary inheritance in a harbor that never had storms. The mesh formalism is in Paper 13, From Chaos to Coherent Gravity, with the deposit mechanics in Paper 4, From Chaos To Collisothermal Cosmogenesis.
Keystone economy: P52 supplies the harmonic core, P54 empties the harbor, P25 delivers the clump. Survival stops being the mystery; destruction would have been.
Deeper kinematics carry the kill in both directions: if Gaia-era data dissolve the secondary peak into a projection artifact, the witness vanishes and this window closes neutrally. But if the clump is real and the inner potential is shown to be cuspy, clump survival becoming dynamically inexplicable, the mesh-cored reading fails alongside the standard one. SCT separately requires clump-bearing dwarfs to show no independent evidence of subhalo harassment; heating signatures matching a subhalo population's statistics would break the quiet-harbor account.