4) Mixed loss: again, one of formula_4 and formula_5 is a gain and one is a loss, however the loss is now significantly larger than the gain. In this case, formula_17. Clearly, we don't want to integrate a mixed loss when the less is significantly larger than the gain. This is often referred to as a "silver lining", a reference to the folk maxim "every cloud has a silver lining". When the loss is just barely larger than the gain, integration may be preferred.