https://en.wikipedia.org/wiki/Service_Granularity_Principle

'service granularity'....you can see it all in a grain of sand....one of the first things 'talked about'...on that MI5 Russian course in 1980....'past, present and future'....all in a grain of sand...the granularity....and how small can alice 'go'.....through the keyhole...through the eye of a needle....because it isn't just about being 'tall' is it?