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C.40.CU:3 - Forces
| Force | Tension |
| Open exploration and receiving need | A response can precede a known use; an imagined use does not establish demand or benefit. |
| Revealing and creating | A probe can reveal a response while also changing the subject or supplying necessary support. |
| Useful reliance and complete explanation | A bounded result can serve a use before its full mechanism is known; stronger claims may require a discriminating inquiry. |
| Local ease and displaced work | Environmental support can remove an operation during use while adding construction, maintenance or dependence elsewhere. |
| Reproduction and development | Another performer needs the operative conditions; changed conditions can require a new capability or arrangement. |
| Present result and later recovery | Current behavior can hide differences that appear only after disturbance, transfer or a longer interval. |