Prof Noel Sharkey, co-founder for the Foundation for Responsible Robotics, is worried by the idea of technology that allows humans to work longer hours.”You could have exoskeletons on building sites that would help people not get so physically tired, but working longer would make you mentally tired and we don’t have a means of stopping that,” he told the BBC.”We design these systems and then ask whether it might be misused. We need ethical design from the start and I would design exoskeletons that switch themselves off after six hours.”

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