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C.39.RO:3 - Forces
| Force | Tension |
|---|
| Reuse | A useful operation should accommodate the intended variations while retaining the conditions that made the construction work. |
| Construction cost | Exposing one needed reusable step can be worthwhile when building a whole library would add little to the receiving use. |
| Explanation | A short expression is easy to carry, but the next practitioner needs the meaning of its inputs and result. |
| Justification | A derived conditional result and an empirical expectation support different uses and further inquiries. |
| Composition | An output can feed another operation only when its meaning and conditions meet that operation’s input needs. |
| Development | A changed case can improve the operation or expose a new question, while unaffected uses remain available. |