A track that flags some of its own display sets and not others proves the
authoring house makes the distinction, so it needs no sibling to
corroborate the flag being in use -- but it still has to look like a full
dialogue track before a forced label is cleared. A small track with a
couple of flagged signs is a forced track, and demoting it is the mistake
the shape test exists to prevent.
Matthew Jackson
28d5897b86