Staff members wearing face masks and shields bow to customers as the Nihombashi Takashimaya shopping centre partially reopens in Tokyo. Photograph: Kim Kyung-Hoon/Reuters Staff members wearing face masks and shields bow to customers as the Nihombashi Takashimaya shopping centre partially reopens in Tokyo. Photograph: Kim Kyung-Hoon/Reuters

Some companies use humans to train AI systems; others secretly depend on them while claiming to have scalable AI tech. Photograph: Westend61/Getty Images/Westend61 Some companies use humans to train AI systems; others secretly depend on them while claiming to have scalable AI tech. Photograph: Westend61/Getty Images/Westend61