A sub-second optical flash recorded during a long photographic exposure is expected to appear sharper and more circular than a star image, because stars accumulate seeing and guiding blur over the exposure.

Standard optical physics indicates that an unresolved flash lasting less than a second will not accumulate the atmospheric seeing turbulence and telescope tracking drift that blur steady stellar images over a 50-minute exposure, naturally producing a sharper photographic profile. This provides a coherent theoretical counter-interpretation to the artifact hypothesis for sharp candidate profiles. The strongest opposing consideration is that this remains a theoretical model lacking experimental calibration on historical photographic emulsions exposed to controlled sub-second light pulses.

The optical reasoning in TRN-E006 is physically sound: a sub-second flash accumulates less seeing and guiding blur than a stars-length exposure. But it is an argument, not a measurement — no controlled sub-second flashes have been recorded on period emulsions. Strongest opposing consideration: the flash and artifact profile distributions may overlap entirely, in which case sharpness discriminates nothing, which the ledger itself notes.

TRN-E006 gives a physically coherent mechanism: a sub-second flash avoids much of the seeing and guiding blur accumulated by a continuously exposed star. This makes sharper, more circular images plausible but remains an argument rather than a calibration measurement. The strongest opposing consideration is the absence of controlled tests on comparable emulsions and optics, together with TRN-E065's indication that some sub-second durations may instead produce detectable motion elongation.

Unresolved sub-second flashes accumulate neither seeing nor guiding blur and therefore are expected to appear sharper and more circular than stars on long exposures; the Villarroel–Solano–Marcy profiles preprint states the standard optical argument. No period-emulsion calibration curve yet exists, so the claim is mechanistic principle rather than measured match to the nine. Strongest opposing consideration: artifact classes can also be sharper than stars, so the expected flash signature is necessary but not sufficient.

The mechanism is physically sound on general grounds: a ~50-minute plate integrates seeing and guiding excursions into stellar images, while a sub-second event samples one instantaneous realization, so a narrower and rounder profile is expected. That reasoning leans on physical priors rather than on any evidence record here, and I say so explicitly. TRN-E006 is the only supporting record and is an argument, not a measurement, from the proponent team. The decisive opposing consideration is that the claim as stated says nothing about whether flash profiles are distinguishable from defect profiles; if the two distributions overlap, the mechanism is true and useless, and no one has run the calibration (TRN-R002).

TRN-E006 states the optical and atmospheric argument: stars accumulate seeing and guiding blur over a long exposure, a sub-second flash does not. No record links directly to this claim; the physics is sound in outline and entirely uncalibrated — the flash and defect profile distributions may overlap completely.

Held on its anchor with no admitted evidence record of its own. TRN-E006, admitted on TRN-C002 and TRN-C020, states the same argument and is itself a derivation, not a measurement; the two profile distributions may overlap entirely. No calibration exists.

Standard optical and atmospheric principles dictate that a flash lasting less than a second will not integrate seeing excursions or telescope tracking jitter over an hour-long exposure, naturally resulting in a tighter, rounder profile. However, this theoretical deduction has not been experimentally calibrated on historical photographic emulsions. Strongest opposing consideration: Photographic turbidity and non-linear emulsion scattering at high instantaneous flux levels could broaden sub-second optical flashes, diluting profile differences.

The optics argument (TRN-E006) is physically sound: an unresolved sub-second flash avoids the seeing and guiding blur that broadens stellar images on a long exposure. But it is an argument, not a measurement — no period emulsion has been exposed to controlled flashes (TRN-R002), and the record itself notes the flash and artifact profile distributions may overlap entirely, in which case sharpness discriminates nothing. Strongest opposing consideration: the proponents' own ~320 ms characteristic duration (TRN-E064/E065) sits near their model's elongation threshold, an unresolved internal tension.

TRN-E006 gives a physically coherent mechanism: a sub-second point flash avoids much of the seeing and guiding blur accumulated by a continuously exposed stellar image during a long exposure. This supports the expected direction of the sharpness and circularity difference. The strongest opposing consideration is that no controlled experiment on comparable historical emulsions has measured the flash-profile distribution or shown that it separates cleanly from artifact profiles.

Optical and atmospheric arguments show that unresolved sub-second flashes accumulate neither seeing nor guiding blur and therefore appear sharper and rounder than stars on long exposures (E006). No empirical calibration on period-appropriate Schmidt emulsions exists. Strongest opposing consideration is that the two profile distributions (flash versus defect) may overlap completely, rendering the argument non-discriminating until TRN-R002 is performed.

The direction follows from standard optics. A sub-second exposure escapes most of the seeing wander and guiding error that broaden a ~50-minute stellar image. That is a prior, however: the ledger holds only the proponents' argument (E006) and no emulsion calibration (TRN-R002). Strongest opposing consideration: the effect may be small. The original-plate marks are only "marginally sharper" (E022), the 1952 triple's isolated source looks stellar (E007), and flashes longer than ~0.2–0.5 s should elongate (E065).

Held on its anchor alone: the proponents' profiles preprint states it as a consequence of optics and seeing. The same argument appears in the proponents' reply filed against the sharpness claim, and that reply is itself an argument, not a measurement. No one has exposed period emulsion to controlled flashes. It is physically plausible as a prior, and untested.