One of the world's top human champions of Go has decided to retire from playing the strategy game professionally, citing AI as a reason he feels he can no longer compete. South Korean Go player Lee Sedol gained international notoriety in March 2016 when he took on Google Deepmind's artificial intelligence AlphaGo. The machine won four out of five matches against Sedol, proving that AI is advanced enough to beat humanity at one of its most complex abstract strategy games. Sedol did not hide his sense of failure after his losses. "I don't know how to start or what to say today, but I think I would have to express my apologies first," he said after the third match.

"AI is processing more and more data faster. It's an efficiency play, because time is money," said Dr. William Morris, associate chief medical information officer at Cleveland Clinic. The promise of AI to do just that--by augmenting human activities, not replacing them--is real. It may one day help physicians with diagnoses, guiding them rather than dictating. "We are not looking for robots to do work for us," said Manu Tandon, chief information officer of Beth Israel Deaconess Medical Center in Boston. "We are looking to make better decisions by benefiting from machine learning and AI." How quickly and successfully AI gets there depends on clinical knowledge.