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EXD.2:3 - Forces
| Force | Practical tension |
| Simplicity and discrimination | Easy values reduce calculation burden but may make different rules produce the same number. |
| Familiarity and correspondence | A familiar setting can support the mapping or draw attention to irrelevant similarities. |
| Guidance and independent contribution | Showing every step can supply the needed relation; an initial attempt can reveal what support is missing. |
| A useful boundary and excess detail | One changed condition can expose the limit, while an exhaustive catalogue can obscure the first connection. |