Sci-fi writer Ted Chiang: "The machines we have now are not conscious"

Ted Chiang is one of the most lauded science-fiction writers of his generation, with his notable works including 'Story of Your Life' and 'Understand". In this interview with the visionary author, Madhumita Murgia discovers his views on the limits of AI, the uses of science fiction - and why there's a "market opportunity for volleyballs".