Much of Tyson’s argument focused on a distinction between workers required to use knives—requiring slightly different protective gear—and others who did not use knives. When the attorney for the employees, David Frederick, took the podium, Justice Scalia asked whether these differences between those who carry knives and those who don’t might be lost in the statistical analysis. Justice Ginsburg demonstrated her detailed recall of the facts and Chief Justice Roberts quizzed Frederick, garnering a few laughs in the courtroom.