doing diagnostic medicine. that was an extraordinary exercise. it's only working at 70%. in other words, in order to give an answer it has to be 70% sure it's correct. so if it took some risks it could probably up that quite a bit. i think it's quite amazing. it's different than just number crunching and beating somebody . >> that's right. that's the distinction, right? >> this has nuance. >> we know computers out-calculate people in math for a long time. the issue is nuance. >> you remember the urban legend in 2001 that hal was ibm one letter removed, right? and hal in 2001 talked to the pilots, eventually took over the ship, but this is much more like that.