How robots can learn to follow a moral code; Nature, October 26, 2023

 Neil Savage, Nature; How robots can learn to follow a moral code

"Many computer scientists are investigating whether autonomous systems can be taught to make ethical choices, or to promote behaviour that aligns with human values. Could a robot that provides care, for example, be trusted to make choices in the best interests of its charges? Or could an algorithm be relied on to work out the most ethically appropriate way to distribute a limited supply of transplant organs? Drawing on insights from cognitive science, psychology and moral philosophy, computer scientists are beginning to develop tools that can not only make AI systems behave in specific ways, but also perhaps help societies to define how an ethical machine should act...

Defining ethics

The ability to fine-tune an AI system’s behaviour to promote certain values has inevitably led to debates on who gets to play the moral arbiter. Vosoughi suggests that his work could be used to allow societies to tune models to their own taste — if a community provides examples of its moral and ethical values, then with these techniques it could develop an LLM more aligned with those values, he says. However, he is well aware of the possibility for the technology to be used for harm. “If it becomes a free for all, then you’d be competing with bad actors trying to use our technology to push antisocial views,” he says.

Precisely what constitutes an antisocial view or unethical behaviour, however, isn’t always easy to define. Although there is widespread agreement about many moral and ethical issues — the idea that your car shouldn’t run someone over is pretty universal — on other topics there is strong disagreement, such as abortion. Even seemingly simple issues, such as the idea that you shouldn’t jump a queue, can be more nuanced than is immediately obvious, says Sydney Levine, a cognitive scientist at the Allen Institute. If a person has already been served at a deli counter but drops their spoon while walking away, most people would agree it’s okay to go back for a new one without waiting in line again, so the rule ‘don’t cut the line’ is too simple."