Analyses of COBE, WMAP, and Planck CMB temperature maps at low multipoles (l < 50) show an apparent excess of power in odd multipoles compared to even ones, a preference for point-parity antisymmetry not expected in a statistically isotropic parity-neutral universe (Kim & Naselsky 2011; Zhao 2014). The signal is closely related to the lack of large-angle correlation and appears direction-dependent.
The standard model assumes inflation produces statistically isotropic and parity-neutral primordial perturbations. Even and odd multipole power should be statistically equivalent. Recovering the observed odd-parity excess within the model requires fine-tuned primordial conditions, unusual cosmic topology, or appeals to systematic and foreground effects, none of which arise naturally.
SCT replaces the hot-dense-center with a superluminal collision and the thermalized debris field. From this single change, parity-odd correlations are predicted from the cascade geometry itself. The original collision deposited an angular momentum vector J = μ(b × v_rel) into our patch (P22, P31, P32). The cross product b × v_rel is parity-odd by construction; any observable inheriting the J-axis structure carries parity-odd signatures naturally.
The cascade-stream filament network (P34, P36) propagates the J vector to all CMB multipoles simultaneously. The Plasma Equivalence Theorem (P29, P30) preserves the geometric imprint through the post-thermalization evolution to recombination. The odd-parity preference at low multipoles is the direct fingerprint of the cascade's parity-odd impact-parameter geometry. The signal is direction-dependent because it has a privileged direction (the J axis), and it is most pronounced at the largest angular scales because the largest cascade stages contributed the most coherent impact-parameter coherence.
The same M10 mechanism produces the parity-odd TB/EB cross-correlations (recid 35), the Axis of Evil (recid 24), the hemispherical asymmetry (recid 28), the bipolar power spectrum (recid 29), the connected quadrupoles (recid 18), the low-l power deficit (recid 32), and the non-random phase correlations (recid 37). The odd-parity preference is the eighth observational projection of the same single cascade-deposited J axis. There is no need for fine-tuned topology or non-standard primordial conditions.
If the odd-parity-preference axis is statistically incompatible with the Axis of Evil, hemispherical-asymmetry, and TB/EB axes at greater than 3σ (i.e., the eight low-l anomaly axes do not share a common direction), the M10 common-collision-axis explanation is refuted. The eight-way cross-axis test from CMB-S4 polarization is a powerful collective falsifiability handle.