MMP.9:8 - Common Anti-Patterns and How to Avoid Them

Observed difficulty in the construction	Repair
Replacing the mean of a nonlinear response by the response at the mean loses heterogeneity.	Derive the missing moment term, then retain, model or bound its effect; :5.2 may already settle the output question.
Hidden state is eliminated together with its initial effect.	Carry the initial-condition term in the memory formula or initialize the corresponding auxiliary value.
A small coefficient is used as the entire error argument.	Bound the multiplied state, accumulated contribution and admitted initial class, as in :5.3.
A closure is judged only on inputs from the source trajectory.	Insert it into the retained evolution and compare the requested result at its intended horizon.
Adding a moment is presented as completing a model although its equation needs another moment.	Continue the derivation until a usable closure or sufficient bound is obtained; otherwise retain the unresolved contribution.