The voids are too empty: ΛCDM fills them with roughly ten times more dwarf-capable halos than the dwarf galaxies observed, and predicts softer walls than surveys measure (Peebles 2001). Feedback can darken small halos but cannot evacuate them; their gravity should still soften boundaries and lens detectably. Two decades of deeper surveys have sharpened the emptiness rather than populated it.
Hierarchical clustering from Gaussian initial conditions necessarily seeds structure everywhere, including underdensities: voids must contain a scaled-down halo population because the random field does not produce truly empty regions. The model can hide the galaxies but is stuck with the halos, so genuine emptiness has nowhere to come from.
SCT replaces the Gaussian random field with collision deposition: the cosmic web is built where collision streams compressed matter into filaments and walls (P33, P34), and voids are the regions between deposition streams, places where the cascade put little matter in the first place (P56). Emptiness then needs no suppression mechanism, because there is no hidden halo population to suppress: the dwarf-capable halos ΛCDM mandates were never seeded there. The sharp walls fall out of the same geometry, as stream boundaries are shock-compressed edges rather than the soft gradients of a smoothed random field.
The framework also explains why the void inventory overshoots in the other direction, with supervoids roughly five times more abundant than simulations produce: inter-stream regions are generic products of collision geometry at every scale, so SCT expects many large, sharp-edged, genuinely empty voids where ΛCDM expects fewer, softer, secretly populated ones. The double-booked feedback defense is no longer needed; reionization physics can do its ordinary work without also carrying the void census.
This is the same deposition map behind the missing-baryon partition along filaments and the giant-structure inventory: one geometry, read as presence in the web and absence between its strands. There is no need to invoke a tuned conspiracy that darkens void dwarfs while lighting their twins at the boundary.
The discriminating census: ΛCDM requires dark halos in voids, SCT requires their absence. Rubin-LSST and deep HI surveys finding the predicted void population, faint dwarfs, starless HI clouds, or a void-interior lensing signature consistent with a tenfold hidden halo count, would falsify deposition emptiness directly. Conversely, the registered supervoid kill applies: if improved simulations reproduce the observed abundance and sharpness of large voids within ΛCDM, the discriminating power of emptiness is removed.