As the global artificial intelligence (AI) race presses on amid a US-China trade war, the Taiwan Semiconductor Manufacturing Company (TSMC)—a $514 billion titan that manufactures most of the world’s AI chips—is warning that it may not be possible to keep its customers’ most advanced technology out of China’s hands. US export controls require chipmakers to monitor shipments and know their customers to restrict China’s access to AI chips. But in a recently p