Sculptor is flattened without a driver, cored where CDM subhalos should be cusped, and carries two distinct stellar populations whose joint kinematics tighten the contradiction (Battaglia 2008; Walker and Penarrubia 2011; Read 2019). The best-measured dwarf spheroidal is the one that least resembles the model's prediction for it.
A dispersion-supported dwarf in a spherical particle halo should relax toward roundness around a cusp. Sculptor's shape needs a flattening agent the model lacks, its core needs feedback its sparse stars can barely power, and the inclination-anisotropy degeneracies invoked in defense make the cusp prediction conveniently untestable exactly where it matters.
SCT supplies the two missing ingredients from its standing inventory. The shape: Sculptor inherited angular momentum from the debris field like every condensed fragment (P31, P32), and even modest inherited J flattens a system gently over a Hubble time without requiring fast rotation today; the observed mild rotation is the surviving surface of the vector that set the shape, the same low-mass-end inheritance carrying Carina's gradient (recid 133). The profile: the dwarf's 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), cored without feedback, the identical mechanism resolving the core-cusp sector at large (recid 127).
The two populations make Sculptor the cleanest test bed rather than a complication: metal-rich and metal-poor components are successive condensations from the deposit's heterogeneous reservoir (P25), and both must orbit in the same mesh-shaped potential. The Walker-Penarrubia two-population measurement, which already excludes a cusp with minimal modeling assumptions, is exactly the model-independent style of constraint the coherent-mesh profile welcomes and the particle picture must argue around. The mesh formalism is in Paper 13, From Chaos to Coherent Gravity; the inheritance ladder in Paper 5, From Chaos To Corotating Hierarchies.
Keystone economy: P31 shapes it, P52 cores it, P25 doubles its populations. Nothing is degenerate; everything is inherited.
Sculptor's data quality makes the kills concrete: full 3D kinematics from Gaia-era proper motions of thousands of members resolving the inner profile into an NFW cusp would refute the mesh-cored reading in the best-measured system. SCT separately requires the flattening axis to relate to the inherited J direction, testable against the mild rotation axis and the Local Group architecture; a shape axis decoupled from the kinematic axis at high significance would break the inheritance account of the flattening.