The Galactic plane defeats the four-component foreground model jointly: AME exceeds its PAH calibration and decorrelates from its tracers, the synchrotron index wanders beyond diffusion models, and cleaned CMB maps keep residuals near the plane (Planck 2013; Hensley 2015). Each component assumes a medium predictable from local conditions, and each finds variation local conditions do not explain.
Foreground modeling inherits a uniformity assumption: the emitting populations, grains, relativistic electrons, ionized gas, are statistically the same everywhere, modulated only by local density, field, and radiation. The plane's joint failures say the populations themselves vary, and the framework has no origin for population-level diversity.
SCT supplies the missing origin: the interstellar medium is not statistically uniform because its material never was. The matter organized into the Galaxy carries inherited diversity from deposition, grain populations with varied compositions and size distributions, gas with heterogeneous processing histories, magnetic field topology descending from the deposited structure (P25, P28), and an inherited component in the rotation distributions of the smallest constituents (P31, P32, the same reading as the AME sector, recid 190 and 191). Component models calibrated on one region then fail on the next not because the physics is wrong but because the population assumption is: the plane, integrating the longest and most varied sightlines, is where inherited diversity stacks deepest, which is exactly where the joint failures concentrate.
The synchrotron wandering reads the same way through the field: a magnetic topology inherited from the deposited structure rather than smoothly wound by the dynamo carries spatial structure that diffusion models built on statistical uniformity cannot capture. The registered expectation is correlational: foreground residuals across components should correlate with one another and with the larger-scale inherited architecture, being symptoms of one underlying diversity, rather than scattering independently as four unrelated modeling errors. The deposit mechanics are in Paper 4, From Chaos To Collisothermal Cosmogenesis, with the inheritance ladder in Paper 5, From Chaos To Corotating Hierarchies.
Keystone economy: P25 diversifies the medium, P32 structures its smallest rotations. The models assumed a uniform cast; the sky employs a varied one.
The registered kill is correlational: if refined component separation shows the plane residuals resolving independently, each component fixed by its own improved local physics with no cross-component correlation and no relation to larger-scale structure, the inherited-diversity reading is unnecessary. Conversely, B-mode-era foreground campaigns finding the residuals irreducible but uncorrelated with any inheritance architecture would leave the diversity real but unexplained by SCT's mechanism.