JWST finds early galaxies forming stars at efficiencies near 50 percent, three to five times the ceiling observed at any later epoch (Xiao 2024; Behroozi 2013), and the requirement is self-undermining: a population converting at 50 percent releases enough supernova energy to unbind its own halo's baryons several times over. The model needs an efficiency its own feedback physics forbids.
Efficiency in the model measures how well feedback-regulated star formation converts hierarchically accreted gas, so a huge stellar mass in a young halo can only mean a huge conversion rate. The inference is forced by the assumption that the gas had to be assembled gradually; the impossible efficiency is the assumption confessing.
SCT dissolves the paradox at the inference step. Collision-seeded proto-galaxies carry their baryonic mass from the deposition epoch (P22, P25), with the mass set by cascade geometry through the collision mass function of Paper 4, From Chaos To Collisothermal Cosmogenesis, rather than accumulated through feedback-regulated accretion. Ordinary star formation at ordinary efficiency, operating on reservoirs that were already large and dense at deposition, produces the observed early stellar masses; the apparent 50 percent is a geometric artifact of assuming the gas had to be grown. No feedback law is violated because no extraordinary conversion ever happened, the same dissolution that carries the JWST mass crisis (recid 107) and the star formation history's early end (recid 111).
The registered discriminant is fuel: if early galaxies formed their stars at ordinary efficiency on large deposited reservoirs, they should still hold substantial residual gas, where the ΛCDM reading, near-total conversion of small accreted reservoirs, leaves them stripped. ALMA gas masses for the JWST efficient-early population test this directly, system by system. Angular momentum inheritance (P31, P32) adds the structural companion: deposited reservoirs arrive with coherent J, which is why the same population shows settled disks and mature morphology (recid 117) rather than the chaos vigorous accretion would leave.
Keystone economy: P25 delivers the fuel, P22 sets the timing. The ceiling at 20 percent was never broken; the denominator was misread.
ALMA and JWST gas-content measurements of the efficient-early population carry the kill: systems showing low residual gas at their observed stellar masses, consistent with near-total conversion of small accreted reservoirs, would refute the deposited-reservoir reading and leave the genuine 50 percent efficiency ΛCDM cannot explain either. Conversely, the seeded picture requires the high-z population's number density to follow the collision mass function's power-law decline rather than the exponential suppression of halo growth, a registered population-level test deepening surveys keep sharpening.