What best describes the relationship between necessity, proportionality, and reasonable belief in force decisions?

• A. They are independent concepts; one may be applied without the others.
• B. They form a triad that must be considered together to justify force.
• C. Only necessity matters.
• D. Only proportionality matters.

Answer: (B)

In use-of-force decisions, three factors must be evaluated together: a reasonable belief that force is needed to counter an imminent threat, the necessity of using force (meaning there were no reasonable alternatives or de-escalation options to achieve safety), and the proportionality of the force to the threat. These elements form a triad that all must be satisfied and considered concurrently to justify the response. If any one part is missing or unreasonable, the justification weakens. For example, you may reasonably believe there is imminent danger, and you must respond with force that is proportional to that threat, but if there was a safe, non-force option available, the necessity criterion isn’t met. Conversely, even with a legitimate threat, using excessive force or relying on force when no threat exists would violate proportionality or necessity. The relationship among these three is interdependent: they work together to determine whether the force used is justified.