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DTM.3:3 - Forces
| Force | Tension |
| A participant model can be detailed | The receiving spread model may need only one output, but it must be the right output. |
| A mean makes computation cheaper | Nonlinear uptake and unequal contact can make the mean misleading. |
| Events unfold at different speeds | Replacing a process with its equilibrium can erase startup, delay or memory. |
| One vertical of methods supports performance | That vertical is not the same structure as transmission between participants. |