Constant COMPUTER_QUIET 

pub const COMPUTER_QUIET: i64 = _; // 1_800i64

A computer whose news is this old (seconds), its table saying it is silenced, is waiting for its news: its Sioul may have stopped without a word (a crash), and its system’s do-not-disturb (Plasma’s) ended with it. A running computer exchanges each minute and writes its news at least every fifteen minutes (sioul-sync’s write_seen). A phone’s modes stay while Sioul is closed: its table holds.