The Supreme Court on Wednesday took up a knotty question of proportional justice, in a case posing the question of how much individual viewers of child pornography owe to the victims of abuse. An animated, hour-long session of oral arguments drew questions from eight justices – Justice Clarence Thomas did not speak – on how much of $3.4 million restitution award sought by the plaintiff known as “Amy Unknown” should be paid by a defendant found with two images of her on his personal computer.