which i think is very interesting in many cases like we see in substance we might not need new measurements the signs and symptoms were already in your data and what truth is really doing is discovering these signs and symptoms to learn something that we couldn't see by eye finally there's been a lot of buzz about big data and I want to make a little subtle point about a technical problem that I think truces solving that is very interesting it truths would be able to learn learn much faster if it had a lot of data on you or it could get