So this is the thing with the Pep Guardiola philosophy. It is special and it is beguiling and one day it will be his to patent. But when it goes wrong, it goes really wrong and here at an enraptured Anfield the wheels of Manchester City's European season came spinning off in a way that nobody could really have imagined.
During a pre-match press exchange this week, Guardiola was asked why he never considers a change of approach to his football, especially for away games in Europe where a clean sheet can be almost as valuable as a goal.