From Keith Braithwaite: a discussion of gauges as a metaphor:http://peripateticaxiom.blogspot.com/2007_07_01_archive.htmlhttp://peripateticaxiom.blogspot.com/2007/09/gauges.htmlIt’s nice. I still like examples as a metaphor, but if it hasn’t caught on in four years and a month, it’s not gonna.