Function late_said 

fn late_said(
    dose: &Dose,
    knowledge: &Knowledge,
    now: i64,
    since: i64,
    why: Option<Late>,
) -> (String, String)

A late reminder’s words: “Check first: …”, then its time and why Sioul cannot tell, why it is late first: its first try could not be shown in time (Late::Retry), it was shown and not confirmed in time (Late::Unconfirmed), or another device may have reminded it (None); then what the devices leave unknown, from since.