Short answer
Confidence is a decision tool. It should reflect source quality, corroboration, recency, consistency, and fit with the leadership question.
Separate source quality from conclusion quality
A strong source can support a narrow fact without supporting the broader conclusion. MI separates confirmed facts from assessment so leaders can see where judgment begins.
Use confidence to prevent overreaction
Thin evidence may justify continued watch but not action. Strong, corroborated evidence may justify escalation. The confidence level keeps those choices distinct.
State what would change confidence
A good brief names the next source, event, filing, confirmation, or timing window that would raise or lower confidence. That makes the next watch action clear.
