haven't done before that's how we get by we take it for granted and that's caused us to get better at dedyings rule essentially. when they're not there and change the way we think so particularly abstract parts of i.q. test we've seen these huge rises and by the way, this is a side point but -- and measure in some ways of gender equity in the society because your dosage of modern work and life is proportional to how you see this i.q. rise so less allowed to engage in modern work you see the efnght separating from men and women. right so if you see point effect not progressing the same for men and women then i think it can be indirect c measure of that in ts society. >> well i don't know if you're aware of this in weekends here in washington in government buildings where, of course, all would love people to be working even on weekends they turn off air-conditioning, heat whatever and you say saturday is a great day to get things done. >> i stole that from oliver who was -- a scientist who digitized by north carolina and most important worked occurred on saturday what he called saturday morning