An enduring problem with self-driving cars has been how to program them to make ethical decisions in unavoidable crashes. A new study has found it’s actually surprisingly easy to model how humans make them, opening a potential avenue to solving the conundrum. Ethicists have tussled with the so-called “trolley problem” for decades. If a runaway trolley, or tram, is about to hit a group of people, and by pulling a lever you can make it switch tracks so it hits only one person, should you pull the lever?
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