Low-multipole polarization is the CMB's most systematics-plagued sector and its most consequential: the EE-anchored optical depth fell from 0.17 to 0.054 as instrument residuals were excavated, TE features near ell of 20 to 30 persist at 2-to-3σ, and the parameters calibrated there (tau, hence sigma_8 and neutrino bounds) propagate everywhere. The same scales host the temperature anomaly family, whose physical companions, if real, live exactly where the data cannot yet separate universe from instrument.
The model's large-angle polarization is fully determined: the same isotropic Gaussian field, screened by reionization, with no freedom for structure beyond the temperature's. Low-ell features can therefore only be systematics, and the anomaly family's predicted polarization companions are defined out of existence before measurement.
SCT states where its fingerprints must reappear. The deposition-era structure that organizes the temperature's large angles, the gradient, the axis, the finite-domain deficit (P44, P48, P55), was imprinted before recombination, so its polarization companions are obligatory: TE and EE structure at the same multipoles, correlated with the temperature anomalies' geometry, distinguishable from systematics precisely by that correlation, since instrument residuals know nothing of the collision axis. The persistent low-ell TE features sit at the right address; current data cannot yet convict them, and SCT's reading is registered rather than retrofitted: recurrence with axis-correlation in cleaner data, or the features were never ours.
The tau excavation gains a second interpretation in passing: a sector hosting genuine deposition structure will keep yielding "systematics" to a pipeline that assumes isotropy, because every physical residual must be attributed to the instrument. The imprint framework is developed in Paper 8, From Chaos To Constructive Relativity, with the staggered reionization context (P47) that also loosens tau's interpretive load carried in Paper 4.
The economy remains the theme: no new premises are spent here at all, the same three or four that organize the temperature anomalies simply owe a polarization debt, and LiteBIRD collects either way.
The address makes the kill clean: LiteBIRD-class low-ell polarization finding TE/EE fully consistent with isotropic ΛCDM, no features, no axis-correlation with the temperature family, would both certify the old features as systematics and remove the deposition imprint's required companions, a genuine double falsification. Features recurring but uncorrelated with the temperature anomalies' geometry would equally break the one-deposition reading.