under state our progress. because the new machine age is more about knowledge creation than just physical pro dpuks. it s mind not matter, brain not brawn, ideas not things. that creates a problem for standard metrics, because we are getting more and more stuff for free. eric joins us now. what do you mean ideas create a problem for standard metrics? wikipedia has tremendous value for me and other people. it is available for free that means that it doesn t show up in their gdp statistics which measures value of goods and services bought and soeltd. one example you used is the robot ibm named watson. watson went on to jeopardy to compete with people and lost. but that was in 2011. the computer kept learning. these little dots here. those are all of the champions on the quiz show jeopardy. at first watson wasn t very good.