A poor underlying model is often revealed through casually thrown (or thrown off) error messages. One post hoc way to address this deficiency -- though it may not improve the model's weaknesses -- is to request feedback from message recipients. Microsoft Office users are sometimes requested to indicate whether a particular message is effective, as shown in this screenshot. Not all messages offer this feature; it would be interesting to know how Microsoft determines which messages deserve this treatment, and what internal workflow accompanies the feedback.
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