I didtnt want to speak about failure rate. My point was that the Jeopardy AI just help real medical student get a better diagnostic. Like a calculator help (without mistake) calculating an equation. Both are not AI . They are more or less powerful tool, helping human by reducing the amount of useless data we have to process to diagnose a patient, or calculate a trajectory. Talking about AI when talking about Jeopardy, Deep Blue, or Alpha go, is just marketing. Without human intervention, AlphaGo will never be able to learn to play Chess, or Magic the Gathering. It's a very good tool, once it is properly used. Like your 80's calculators.. which at least helped get to the moon, while AlphaGo just help labeling " chimps" on your phone's pictures: