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DTM.5:3 - Forces
| Force | Tension |
| Groups influence continuation | A chosen grouping can create an apparent group effect without a group-level cause. |
| Aggregate change is observable | Its contributing events may have different sources or mixed parentage. |
| Within-group advantage matters | It may conflict with what makes a collective continue or contribute. |
| Selection language is compact | It can conceal changes of counted unit and normative recipient. |