A stable signature for a set of contradictions, so a caller surfaces each one ONCE rather than
on every poll of an unchanged disagreement. The rig defect was found after a whole evening of
silence; the cure for silence is not a log line per second.
Keyed on the facts and both values, so a contradiction that CHANGES (the operator swapped the
box) is a new signature and gets said again.
A stable signature for a set of contradictions, so a caller surfaces each one ONCE rather than on every poll of an unchanged disagreement. The rig defect was found after a whole evening of silence; the cure for silence is not a log line per second.
Keyed on the facts and both values, so a contradiction that CHANGES (the operator swapped the box) is a new signature and gets said again.