Severus contemplated something, as he saw Hermione fidget with her wand-holster in her tactical robes while her wand was in her hand. Miss Gran... Misses Granger is in possession of it, isn't she? It won't do her mental faculties any favors if she does wield it. If anything, it can quicken any mental deterioration she has in order to twist her to use the Elder Wand.