Fable
The person sitting in the passenger seat cannot close their eyes for the driver
At a mountain road station there was an old coachman, and beside him often sat a co-driver. The co-driver knew the road, could read the clouds, warned of curves and falling rocks ahead, and helped hold up a lamp at night.
The new owner saw that the co-driver gave accurate reminders, so he said that since the co-driver knew the road, the driver might as well sleep for a while. On the first stretch of flat road, the co-driver directed based on old experience, and the carriage moved fairly steadily. The owner felt he had saved himself one person.
When they reached the mountain pass after the rain, the old road was blocked by mud. The co-driver spotted a small path nearby and called out to the driver to turn onto it. The path could carry an empty cart, but not one fully loaded with medicine chests; the wheels sank into the mud and the cart nearly tipped over the slope.
The employer's first remedy was to have the deputy memorize a few more routes. But mountain weather, load, horsepower, and cargo urgency varied day by day. Merely suggesting routes still couldn't take on the full journey's trade-offs for the driver.
The old coachman set new seating rules. The passenger seat is responsible for watching blind spots, warning of risks, handing over water, and checking road signs; whether to change route, when to stop, and whether to speed up are decided by the person holding the reins.
The co-pilot did not become useless because of this. On the contrary, he was more valuable in the right position: he could help the driver miss less, tire less, and take fewer wrong turns, without taking the final judgment away from the reins.
The owner later understood that the value of the co-pilot seat is to enhance driving, not take over driving. If you want someone to deliver goods alone from the start, that requires a different set of delegation, boundaries and responsibilities—not just turning up the volume of the co-pilot's voice.
Later the station also set up an assessment for the co-pilot, not judging whether he could complete the whole trip alone, but whether he gave timely reminders, whether he explained his reasoning clearly, and whether he filled in blind spots when the driver was busy and flustered. The driver was still responsible for arriving; the co-pilot was responsible for making the trip more stable. With clear seats, cooperation won't turn into a scramble for the wheel on a dangerous road. The more complex the mountain road, the more important this division of labor becomes. A co-pilot can make the driving stronger, but cannot replace the person responsible to the end. If the owner wants someone to deliver alone, they must sign a separate mandate, grant separate permissions, and set up separate remedies, rather than mistaking the co-pilot for the driver. Later the team also had fewer disputes: the more accurate the reminders, the steadier the driver; the clearer the responsibility, the more at ease the co-pilot. This saying was later written into the newcomers' handbook, reminding everyone to look at the on-site cost first before talking about saving effort. And precisely because of this reminder, when similar difficulties arose later, no one rushed to apply old methods.