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MMP.13:3 - Forces
| Force | Tension |
| Target and parameterization | The model can contain many unknowns while the use needs only one function of them. |
| Conditional probability and repeated-use performance | A posterior probability and confidence coverage answer different questions. |
| Convenient defaults and supported assumptions | Independence, a prior or a normal approximation can simplify the calculation while changing its meaning. |
| Joint uncertainty and simple summaries | Separate standard errors can lose covariance needed by the target. |
| Inferential precision and computational precision | More accurate integration can leave the subject uncertainty unchanged. |