if it is not the world s best diagnostician i wouldn t be surprised if in 20-years it was and we go to doctor watson. you have written we have the first industrial revolution expanding peopleally strength and power of our bodies. this is about expanding our brain. you say this one is bigger. we talk about the incredible increase in living standard brought about by the steam engine in the first industrial revolution. that was about physical power. now we are improving mental power, cognition, through cools like watson and big data and other tools. ultimately i don t see how that wouldn t be just as big if not bigger than the first industrial revolution. this is going to keep happening the computer per form man s doubles every 18 to 24 months. computers get faster and better. if you look at a sony play