“IF YOU FOLLOWthe ongoing creation of self-driving cars, then you probably know about the classic thought experiment called the Trolley Problem. A trolley is barreling toward five people tied to the tracks ahead. You can switch the trolly to another track—where only one person is tied down. What do you do? Or, more to the point, what does a self-driving car do?

Even the people building the cars aren’t sure. In fact, this conundrum is far more complex than even the pundits realize.” – fromSelf...