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DTM.2:3 - Forces
| Force | Tension |
|---|
| Few parameters are convenient | A parameter that combines different mechanisms may not survive the proposed change. |
| Contacts supply information | Repetition, independent endorsement and conflicting advice can change its effect. |
| A variant needs a traceable identity | Learning and adaptation may be productive transformations rather than copying errors. |
| Events must be observable | Available records often show publication or access, not performance. |