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C.40:3 - Forces
| Force | Tension |
| Present comparison versus useful continuation | A currently inferior variation may expose a useful next question. |
| Fixed contribution versus changing possibilities | The same material can be developed for today’s result or before its later use is settled. |
| Diversity versus burden | Further variations, retention and recovery all consume resources. |
| Source success versus target use | A useful way may fail when the receiving conditions change. |
| Reusable material versus another person’s capability | A retained artifact can be shared without transferring the skill or permission needed to use it. |