Final answer:
Eagleman argues that the justice system is unfair due to the arbitrary judgment of blamelessness or blameworthiness. This is because the system's determination of guilt and punishment can vary depending on various factors.
Step-by-step explanation:
Eagleman argues that our justice system is unfair due to the movement of the "fault line" over time. This means that the system sometimes judges certain people accused of crimes as blameless while others are deemed blameworthy. The arbitrariness is seen in how the system determines guilt and assigns punishment, which may vary depending on factors such as circumstances, mitigating factors, and a number of other considerations.