Ten years ago, IBM made a gamble. Through a monumental advertising and PR campaign, it promised that its AI technology–Watson–would transform the health care industry as we know it. A decade and billions of dollars later, Watson Health is being sold for parts. What went wrong with IBM's "moonshot?" And what does Watson's failure tell us about the promise of AI for health care?

Ask any expert about artificial intelligence and they'll tell you it's going to radically change the world. Ask them for specifics on how and they'll probably start fighting. Leading researchers in the field can't agree if smart machines are an apocalyptic threat to humanity or the key to a blissful, leisure-filled future. Will robots steal most of our jobs driving vicious inequality, or will the dirty and boring jobs of today just be replaced by new, better ones? With some of the country's biggest brains battling over the issue, do the rest of us non-experts have any hope of wrapping our heads around the capabilities of one of the most important technologies transforming our lives?