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The Cab Driver's Fallacy[]

Similar to the sunk-costs fallacy; having a particular goal in mind and refusing to give up on it, however impossible it seems, while also ignoring the possibility of doing even better. Named for the tendency of taxi drivers to try to earn a specific amount each day. On slow days they will keep going to reach the target, while on good days they will quit early as soon as the target is reached. They would do much better if they would go home early on slow days (thus saving gas, as well as wear and tear on the car) and keep going past their target if it's busy (when they barely have to drop off one fare before getting another one).