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A.4:3 - Forces
| Force | Tension |
|---|
| Stable subject, changing accounts | Compare the continuing System with the selected account without deriving System identity from document versions. |
| Intended result and actual facts | Preserve a normative target while learning what is happening; a descriptive prediction can raise a different revision question. |
| Comparable evidence and effort | Obtain the facts needed by the criterion while reusing an adequate comparison or observation. |
| Diagnosis and authority | Discover a discrepancy without presuming which participant may change the subject, account or receiving use. |