It abstains out loud
Where Ardora cannot demonstrate a trait at its published ceiling, it declines — visibly, with a reason — rather than hand you a name for a shadow. The marked-empty is published as loudly as the reading. An entry that hides its blanks is a defect; an entry with none at all is suspicious. The atlas can be trusted precisely because every published reading is a shape the heron actually saw, and everything else is left honestly empty.
