Max Newman devised a decision tree and then set Jack Good and Donald Michie the task of devising others that were then used by the Wrens without recourse to the cryptanalysts if certain criteria were met.
Max Newman devised a decision tree the task of devising others. These others were then used by the Wrens without recourse to the cryptanalysts. Certain criteria were met. Max Newman then set Jack Good the task of devising others. Max Newman then set Donald Michie the task of devising others. These others were then used by the Wrens without recourse to the cryptanalysts. Certain criteria were met.