There examples of redundant prerequisites in the techtrees. I would like to collect them here.
Redundant:
Armor/Artillery
128 mm armor has the previous model and Mass Production as a prerequisite.
Mass Production is redundant since you need 88/280mm cannon as a prerequisite for the 88mm model. The cannons also have Mass Production as a prerequisite. So Mass Production is redundant.
Same goes for the 105 mm that requires Advanced Parts. You cannot have Mass Production if you do not have Advanced Parts and since the 88 mm all ready requires Mass Production...
Naval Doctrine:
Fleet defense has, among others, Basic Radar and Power Projection as prerequsite. Power Projection has Improved CV as a prerequisite which has as one preq Average Radar... which has Basic Radar as a preq... which makes Basic Radar redundant as preq for Fleet Defense.
Redundant:
Armor/Artillery
128 mm armor has the previous model and Mass Production as a prerequisite.
Mass Production is redundant since you need 88/280mm cannon as a prerequisite for the 88mm model. The cannons also have Mass Production as a prerequisite. So Mass Production is redundant.
Same goes for the 105 mm that requires Advanced Parts. You cannot have Mass Production if you do not have Advanced Parts and since the 88 mm all ready requires Mass Production...
Naval Doctrine:
Fleet defense has, among others, Basic Radar and Power Projection as prerequsite. Power Projection has Improved CV as a prerequisite which has as one preq Average Radar... which has Basic Radar as a preq... which makes Basic Radar redundant as preq for Fleet Defense.