J0313-1806 holds 1.6 billion solar masses at z = 7.642, unreachable by Eddington-limited growth from any stellar seed even starting at z = 30; UHZ1 at z near 10 has a black hole rivaling its host's stellar mass; and JWST finds black-hole-to-stellar ratios 10 to 1000 times above the local relation. Population III seeds are too light, direct-collapse channels too rare and tuned, and heavy seeds above 10⁸ solar masses have no ΛCDM formation channel at all.
The model grows everything from small beginnings: black holes start from stellar collapse and grow by accretion inside hierarchically assembling halos. That assumption caps early black hole masses by seed size times Eddington time, and the observed objects exceed the cap; the model has nowhere to put a billion solar masses at 700 million years.
SCT replaces the hot-dense-center with a superluminal collision cascade, and growth with seeding: head-on collision geometries (impact parameter near zero) convert kinetic energy into concentrated thermalized debris that collapses directly into compact objects, with seed masses M_seed = f_BH × α_th × f_b × μ spanning 2.2 × 10⁷ to 2.2 × 10⁹ solar masses for parent pocket masses of 10¹² to 10¹⁴ solar masses (P46). The billion-solar-mass black holes did not race the Eddington clock; they were deposited near final mass at the seeding epoch, and accretion since has been bookkeeping rather than heavy lifting (P22, P23).
The demographics follow. Overmassive ratios are natural because the seed and its host galaxy were set by different aspects of the collision geometry, head-on channels favoring the compact object while grazing channels build the stellar disk (P31), so the local Magorrian relation is a late co-evolution outcome, not a birth condition. UHZ1-style black holes outweighing their hosts are the unprocessed seeding signature, expected to be commonest at the highest redshifts and diluted by later star formation, exactly the observed trend.
This is the same seeding channel behind the high-z quasar clustering excess and the Little Red Dots. There is no need to invoke sustained super-Eddington accretion or vanishingly rare tuned direct-collapse environments.
The registered kill: a complete census of z above 7 black holes showing every system explicable by Eddington-limited growth from stellar-mass seeds formed below z of 30, with no residual overabundance requiring seeds above 10⁶ solar masses, removes the collision-seeding signature. The trend test cuts the same way: if deeper JWST samples show black-hole-to-stellar ratios converging toward the local relation at the highest redshifts rather than departing further, seeds were light and grew, contrary to the born-big channel.