Alternatively, the sunk cost fallacy is a heuristic that compensates for the fact that calculating marginal value (especially in high-pressure settings) is hard

Alternatively, the sunk cost fallacy is a heuristic that compensates for the fact that calculating marginal value (especially in high-pressure settings) is hard. Evolution has also selected for more powerful brains that allow us to develop more sophisticated frameworks (e.g. law, science) for reasoning than pure emotion.