Below multipole 30 the CMB carries only 60 to 90 percent of the power ΛCDM predicts, and the quadrupole arrives at a quarter of its expected value, a deficit that has persisted unchanged through COBE, WMAP, and Planck. It arrives accompanied: the quadrupole-octupole alignment, hemispherical asymmetry, and parity asymmetry live at the same scales, an organized family the model must call collective bad luck.
Inflation stretches fluctuations to arbitrarily large scales, so the model assumes the primordial spectrum runs smoothly through the lowest multipoles with no largest scale and no preferred direction. A real cutoff or boundary in the deposition of perturbations is impossible by construction, leaving cosmic variance or bespoke inflaton features as the only outs.
SCT replaces the hot-dense-center with a superluminal collision whose overlap volume is finite. Perturbations were deposited by collision stages acting within that domain, and the deposition has a largest characteristic scale, Λ_max of about 2 R_pocket, around 5 Gpc (P55). Modes larger than the boundary scale were never properly populated: there was no mechanism operating out there to populate them. The low-multipole deficit is the edge of the deposit, the scale at which the sky starts showing the boundary of the event that built it (P26).
The companions come with the same geometry. The unified large-angle analysis of Paper 11 derives the quadrupole suppression at C₂ of about 0.25 times the ΛCDM expectation and the hemispherical power asymmetry at A_hem of about 1.07 from one 29th-level collision event, with the collision axis (P48) supplying the preferred direction the alignments trace. What ΛCDM must treat as four independent accidents at the same scales, SCT produces as four projections of one finite, oriented deposition event. The acoustic physics below those scales is untouched: thermodynamic state sufficiency (P29, P30) keeps every sub-horizon prediction identical to ΛCDM, which is why only the largest angles carry the signature.
There is no need to invoke inflaton potential features, pre-inflationary fast-roll phases, or an appeal to cosmic variance stretched across four simultaneous anomalies.
The registered kill: the suppressed quadrupole and the hemispherical asymmetry must be correlated, two faces of one event. If LiteBIRD or CMB-S4 polarization, which supplies nearly independent modes at the same scales, shows the quadrupole suppression and the asymmetry to be statistically uncorrelated, of independent origin, the unified collision mechanism is falsified. Polarization consistent with an isotropic Gaussian sky at low ell would likewise dissolve the family into the accident ΛCDM hopes for.