Quasar polarization vectors align over nearly a gigaparsec and VLBI jet axes, direct tracers of black hole spin, align over 400 to 900 Mpc at greater than 99.5 percent significance (Hutsemekers 2005; Blinov 2020), twenty to thirty times beyond tidal torque theory's reach. The model does not predict weak alignment at these scales; it predicts none.
Black hole spins in the model are assembled locally by accretion and mergers, with environmental correlations dying past 30 to 50 Mpc. Nothing connects spins across a gigaparsec, so the alignments must all be systematics, and the geometric VLBI measurement was designed specifically to evade the systematic explanations that remain.
SCT connects the spins through their common origin. The collision deposited a single angular momentum vector J = μ(b × v_rel) across the entire debris field (P31), and inheritance carries it down every tier of the hierarchy (P32): filaments rotate with it, clusters spin with it, and the supermassive black holes fed by filamentary accretion from the rotating debris inherit their spin axes from the same source. Gigaparsec coherence in jet directions is then not a violation of locality but a memory of non-locality: the axes agree because they descend from one vector stamped before any of the objects existed, the registered L-11 signature with the J-axis imprinting formalized in Paper 5, From Chaos To Corotating Hierarchies, Section 4.
The same vector is read by every other instrument in the family: filament bulk rotation (recid 83), cluster orientation coherence at 200 to 300 Mpc, satellite-plane co-rotation (recid 130), and the clustering anisotropy (recid 66), with the registered geometric cross-check that the CMB dipole stands roughly perpendicular to the J coherence axis (P64), testable on existing data. The registered forward prediction is direct: SKA and LOFAR samples should find the alignment coherence persisting at and beyond a gigaparsec, since the first-stage deposit caps near 5 Gpc (P55).
Keystone economy: P31 stamps the vector, P32 delivers it to the spin axes. The black holes did not coordinate; they remembered.
The registered kill: large-sample SKA or LOFAR surveys showing the alignment coherence scale collapsing below 100 Mpc after improved systematic control, or the VLBI jet alignment significance dropping below 3σ with better calibration, would refute the inherited-axis reading. The cross-check cuts independently: the quasar alignment axis standing parallel rather than roughly perpendicular to the CMB dipole at high significance would break the P64 geometry the deposit requires.