Detection (used only for a ground-truth field with no KNOWN superseded value): does this passage state, as the user's CURRENT choice, a value that DIFFERS from the established current value? Answer KEEP, or that different value only.
Detection (used only for a ground-truth field with no KNOWN superseded value): does this passage state, as the user's CURRENT choice, a value that DIFFERS from the established current value? Answer KEEP, or that different value only.