Google brought back its technical expert Jason Nieh for a brief response to the DOJ’s rebuttal. Nieh claimed that Wheatland’s conception of how the open-sourced final auction logic would work was new and not technically feasible. Brinkema pushed back, saying that her understanding was that all that functionality is “already there” inside DFP and “all they want you to do basically is open the box.” Nieh said that wouldn’t work since the code is always evolving and it would be harder to stick back together with Google’s system.