Actually, the article makes a point of demonstrating how subjective the strike zone is. 'The interpretation of the strike zone is notoriously subjective and va

Actually, the article makes a point of demonstrating how subjective the strike zone is. 'The interpretation of the strike zone is notoriously subjective and varies with each umpire. For example, human umpires often call a strike if the ball crosses the plate in the rear corner. However the automated ball-strike system uses an imaginary plane that bisects the middle – not the front or the rear – of home plate. There are more complications. Since every player has a unique height, each has a unique strike zone.'