An understanding of AI's limitations is starting to sink in

IT WILL BE as if the world had created a second China, made not of billions of people and millions of factories, but of algorithms and humming computers. PwC, a professional-services firm, predicts that artificial intelligence (AI) will add $16trn to the global economy by 2030. The total of all activity--from banks and biotech to shops and construction--in the world's second-largest economy was just $13trn in 2018. PwC's claim is no outlier. Rival prognosticators at McKinsey put the figure at $13trn.