Ron and Harry left her space to fume about her imperfect potion - she might be willing to concede that Malfoy knew his way around a cauldron, but she refused to believe that Harry had suddenly developed an interest in the subject, never mind the ability to be better than her -, leaving her to stew with her perfectionism for two days before admitting to the detailed notes in Harry’s textbook. And while the world was suddenly right again, Hermione still ignored them for a week because she couldn’t condone cheating.