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A.9:3 - Forces
| Force | Tension |
| Simple operation, faithful meaning | A compact formula must still express the intended result under the actual subject model. |
| Reuse, changed conditions | Retain a justified law while reopening the specific dependence or applicability premise that changed. |
| Local work, combined result | Parallel or separate computation helps only when its recombination preserves what the receiving use needs. |
| Useful answer, incomplete basis | A bound or separate inputs can be a better answer than an unsupported scalar. |