Function screened 

pub fn screened(row: Row) -> bool

Whether a row is the call screening’s (screening), apart from the matrix: numbers nobody knows and hidden numbers, on calls. Kept in the matrix for the screening’s first values and for when a declined call is listed (listed), never shown in its grid nor said by its cards. No preset nor any write of the matrix sets them, and no count of changes counts them (review of part 2, 19 October 2026, F2).