The millimetre-scale particle sizes of the dusty-plasma mechanism proposed for the POSS-I transients are inconsistent with the centimetre-to-metre facet sizes inferred from transient magnitudes under the specular-reflection model, so a dusty-plasma origin is excluded unless the size inference is substantially revised.

The authors' deductive argument that millimeter-scale dusty plasma particles cannot match the centimeter-to-meter reflecting facets required to produce the observed plate magnitudes is logically valid within their adopted specular reflection model. However, the inferred facet sizes are entirely model-dependent derivations that assume unmeasured flash durations and specularities, and are artificially truncated by the catalog's exclusion of bright sources. The strongest opposing consideration is that within the specific physical assumptions of the geometric reflection framework, millimeter-scale plasma grains are mathematically incapable of providing the required optical flux.

TRN-E038 supports the claim nearly verbatim. But the exclusion rests on the same paper's model-dependent facet-size inference (TRN-C111), which is itself biased downward by the inherited bright-source exclusion (TRN-E062/TRN-E063), and Cann's dusty-plasma mechanism was never modeled directly. Strongest opposing consideration: the claim's own escape clause — if the size inference is substantially revised, which its selection bias makes plausible, the exclusion lapses.

TRN-E038 directly states the proposed millimetre-versus-centimetre-to- metre size discrepancy, but the larger sizes are outputs of assumed altitudes, reflectivities, flash durations, and specular geometry rather than measurements. The strongest opposing consideration is TRN-E020's mechanism in which millimetre grains aggregate into metre-scale reflective structures, meaning particle size and aggregate optical size need not be the same quantity. Because that mechanism was not directly modelled, exclusion of dusty plasma is premature.

Conditional on the modelling paper’s centimetre-to-metre facet-size inference, millimetre-scale dusty-plasma particles are inconsistent and the authors state the discrepancy essentially rules that mechanism out unless sizes are revised. The size inference itself is model-dependent and selection-biased by bright-source exclusion. Strongest opposing consideration: if flash duration, reflectivity or altitude assumptions shift, the size mismatch disappears and dusty plasma remains viable.

The exclusion rests entirely on the same paper's own facet-size inference (TRN-E061), which is derived from wholly assumed altitude, specularity, duration and reflectivity, and which the authors themselves flag as biased downward by the exclusion of bright sources from the parent catalog (TRN-E062, TRN-E063). Cann's mechanism is not modelled directly. The claim's own escape clause — "unless the size inference is substantially revised" — is doing most of the work, since that inference is exactly the least secure quantity in the chain, and one toy model excluding another moves nothing on the observation rung.

TRN-E038 (weak): the modelling preprint states millimetre-scale plasma grains do not align with its inferred facet sizes and 'essentially rules out dusty-plasma interpretations' unless sizes are revised. The size inference itself (TRN-C111; TRN-E060/E061) is a derivation from assumed altitude, specularity, duration and reflectivity, and TRN-E062/E063 record the authors' own concession that bright-source exclusion biases sizes downward. Cann's mechanism is not modelled directly.

TRN-E038 (weak, supports) states the size mismatch; it rests on the facet-size inference of TRN-C111, whose own records (TRN-E062, TRN-E063) concede that excluding bright sources biases sizes downward and whose inputs are all assumed (TRN-E060).

The paper correctly notes that sub-millimeter dusty plasma grains cannot account for the centimeter-to-meter specular facets derived from transient magnitudes. However, this exclusion is entirely circular, resting on an unverified specular reflection toy model that assumes fixed flash durations, flat geometries, and an artificially truncated magnitude sample. Strongest opposing consideration: If the specular reflection model is taken as an accurate representation of the transients, the physical size discrepancy with dusty plasma aggregates is mathematically inescapable.

TRN-E038 supports the size-mismatch exclusion nearly verbatim, but it rests entirely on the same paper's model-dependent size inference, in which every input (altitude, specularity, duration, reflectivity) is assumed and the sample is selection-biased toward small facets by the bright-source exclusion (TRN-E060–E063). One toy model excluding another, both conditional on TRN-C021, does not move the observation rung. Strongest opposing consideration: the exclusion lapses by its own conditional if the size inference — already flagged by its authors as selection-biased — is revised.

TRN-E038 reports the stated mismatch between millimetre-scale dusty-plasma particles and the centimeter-to-metre reflecting facets inferred by the group's specular model, including the qualification that revised size estimates could reopen the mechanism. The conclusion is internally consistent with the assumptions stated in the claim. The strongest opposing consideration is that the facet sizes are model-dependent, selection-biased estimates and Cann's mechanism was not directly modeled, so the claimed exclusion is not robust.

The modelling preprint states that millimetre-scale dusty-plasma particles are inconsistent with the centimetre-to-metre facet sizes inferred from magnitudes under specular-reflection assumptions, thereby ruling out that mechanism unless sizes are revised (E038). The size inference is itself model-dependent and selection-biased (bright sources excluded). Strongest opposing consideration is that one toy model excluding another adds no weight to whether the marks are flashes at all.

The claim misdescribes the mechanism it rules out. The ledger's record of the dusty-plasma mechanism has dust aggregating into icy bodies 1–4 m across (E020). That overlaps the inferred centimetre-to-~3 m facets (C111), so no size discrepancy arises and the exclusion does not follow. E038 does not model Cann's mechanism, and specular-facet sizes do not apply to aggregates in any case. Strongest opposing consideration: E020 is an abstract-only read. If metre-scale aggregation proved implausible, the argument would bite. That is a prior-based question these records leave open.

TRN-E038 states the mismatch between millimetre plasma grains and inferred facet sizes. That size inference (TRN-C111) is built from assumed altitude, specularity, duration and reflectivity. Its authors concede that bright-source exclusion biases it toward small sizes (TRN-E062, TRN-E063, on TRN-C111). Cann's mechanism is not modelled directly. On the parent TRN-C021, Cann's own flux argument gives icy aggregates 1–4 m across (TRN-E020).