For its part, Yahoo has maintained that it scooped up auto-saved drafts using a “proprietary tool,” and denies the defense’s claims that it had to have had access to government surveillance to collect the information. At the same time, some of Yahoo’s own staffers allegedly contradicted each other with their earlier explanations of what happened. It may need a formal, thorough explanation if it doesn’t want to maintain doubt and raise Knaggs’ hopes for an appeal.