Slightly more accurate squares

In the rule “Graduating”, replace this text: Each Defuser has a Low Grade equal to 1 plus the High Grade of the Defuser preceding them in the Graduation Grade, (0 if there is not such a Defuser), and a High Grade equal to that Defuser’s current Expertise squared plus the High Grade of the Defuser preceding them. with this text: Each Defuser has a Low Grade equal to 1 plus the High Grade of the Defuser preceding them in the Graduation Grade (or a Low Grade of 1 if there no Defuser preceding them), and a High Grade equal to that Defuser’s current Expertise squared plus the High Grade of the Defuser preceding them (or a High Grade equal to that Defuser’s current Expertise squared if there no Defuser preceding them).