As Andrew recently explained, the District of Delaware has a longstanding rule against "sandbagging," or saving arguments for a reply brief that should have been in a full and fair opening brief. But not every new argument is sandbagging.
In f'real Foods, LLC v. Hamilton Beach Brands, Inc., C.A. No. 16-41-CFC (D. Del. June 24, 2020), the defendants opposed a permanent injunction on sale of their commercial blenders by pointing out that the plaintiffs presented no evidence that their blender could meet the technical requirements demanded by one of defendants' customers (Dairy Queen).
In reply, the plaintiffs submitted new evidence and argued for the first time that their blenders could be modified to meet Dairy Queen's …