In the standard model, CMB temperature and polarization anisotropies arise from a statistically isotropic Gaussian random field, which implies that the phases of spherical-harmonic modes are independently and uniformly distributed once the power spectrum is fixed. Reports of phase correlations and non-random alignments at low l (and in some LSS statistics) suggest non-Gaussian phase-correlated initial conditions or systematic effects (Copi 2010; Planck XVI 2016).
The standard model with simple inflationary initial conditions assumes the phases of all Fourier modes are independent and uniformly distributed. Recovering observed phase correlations within the model requires non-Gaussian initial conditions, multi-field inflation, or unaccounted-for foreground or systematic contamination. None of these is parsimonious.
SCT replaces the hot-dense-center with a superluminal collision and the thermalized debris field. From this single change, the cascade deposits a coherent geometric structure into the post-thermalization plasma, and the Fourier-mode phases of that structure are not independent. The original collision deposited an angular momentum vector J = μ(b × v_rel) into our patch (P22, P31, P32), and that vector defines a privileged spatial axis carried coherently across all multipoles by the cascade-stream filament network (P34, P36).
Modes oriented relative to the J axis carry coherent phase information because they were deposited by cascade stages with a common geometric origin. Modes oriented perpendicular to J carry different but still correlated phase signatures from the same parent cascade. The Plasma Equivalence Theorem (P29, P30) preserves these cascade-epoch phase correlations through the post-thermalization evolution to recombination, so the CMB inherits the cascade's phase coherence as a fossil imprint of the collision geometry.
The phase-correlation axis is predicted to align with the Axis of Evil (recid 24), the hemispherical-asymmetry axis (recid 28), the bipolar power spectrum axis (recid 29), the parity-odd TB/EB axis (recid 35), the connected-quadrupoles axis (recid 18), and the low-l power deficit axis (recid 32). Seven anomalies share one axis because they all trace back to one collision-deposited J vector, detected by seven different statistical estimators sensitive to the same geometric imprint. There is no need for non-Gaussian initial conditions or multi-field inflation.
If precision CMB-S4 polarization analysis finds the phase-correlation axis statistically inconsistent with the Axis of Evil and bipolar-power axes at greater than 3σ (i.e., the seven anomaly axes do not share a common direction), the M10 common-collision-axis explanation fails. The seven-way cross-axis test is the strongest single falsifiability handle on the M10 framework.