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A.21:3 - Forces
| Need | Tension |
|---|
| One usable decision | The practitioner needs one action, while every contributing result must remain recoverable. |
| Order independence | Evaluation order should not change the decision, but early failure may justify deferring expensive work. |
| Policy flexibility | Different profiles may react differently, but no implicit default or path boundary may supply policy authority. |
| Plain entry | “Worst result wins” is easy to use, while exact result and rule identities are needed for replay. |
| Conditional assurance | Crossing, publication, regulation, safety, and reuse can need more evidence, but ordinary local use should stop earlier. |