If you've ever taken a philosophy or ethics class, you're probably familiar with the trolley problem - a thought experiment that reveals that moral psychology and decision-making isn't always black-and-white.
In a similar vein, TikTok user ashleyp shared something called the shopping trolley theory. The theory asks, "There is no dire emergency. Do you accept your duty to return the cart even though you gain nothing?"
Returning your trolley is an easy task and socially understood to be the polite thing to do after loading your car. But at the same time, it's not illegal to just abandon your trolley. Employees come around and collect them and return them anyway, so what's the big deal if you leave it?
"The shopping trolley test is the ultimate litmus test for whether a person is capable of self-governing," __ashleyp explains in the TikTok.
You gain nothing by returning the shopping cart and lose nothing by not returning it. But ultimately, you know returning the shopping cart is the right thing to do.
What the theory suggests then is that if you return the shopping cart - even if there's nobody else in the parking lot and no employees can see you - but solely because you know it's correct, you're a good member of society.
If you thought about it and think "Well, what if I just don't feel like putting it back?" you might not be the most moral person.
Some say people don't return trolleys because they want to "give an employee work" but grocery store workers rubbish that idea.
"I used to work at a supermarket. Please return your trolley," one person commented. "It sucks going around the car park finding all the abandoned ones and putting them back."
"I return them because I remember how miserable it was working at a grocery store and having to collect them in the sweltering heat," another commenter replied.
- This story first appeared on In The Know