That the Supreme Court has already stated QI is a thing can be seen as their reason not to argue it again. They're saying they don't see why the court would com

That the Supreme Court has already stated QI is a thing can be seen as their reason not to argue it again. They're saying they don't see why the court would come to a different conclusion. It's a view that law is deterministic: given a particularly worded legislation and a specific finding of fact, only one conclusion can be arrived at. There can't be multiple interpretations. (A court can strike down a vague law, but if they uphold it then it must not be.) And an interpretation can't change over time or else that would be "legislating from the bench."