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PSD.8:3 - Forces
| Force | Tension |
| Breadth and relevance | A different mechanism may expose a better direction, while an unbounded search consumes the decision horizon. |
| Plural formulations | Alternatives should address material interpretations without pretending that every interpretation seeks the same result. |
| Imagination and qualification | A proposal may be worth investigating before feasibility is known, while unsupported proposals cannot be presented as ready commitments. |
| Combination and interaction | Hybrid or staged directions can preserve options, while shared resources, incompatibilities, and delay can remove their apparent advantage. |
| Generation and choice | Early preference helps identify concerns but can suppress candidates before their consequences are known. |