The Doc Searls Weblog : Monday, December 9, 2002 Howard R: We need to re-read what Doug Englebart wrote in '63 about people using three things: artifacts, training and language... Point: we overstress artifacts. JP: We have three email populations: 1) college graduates who have used email all along; 2) old people; and 3) people who don't get it. Two can't be trained.