Final answer:
Sophie's proof that she was good and her roommates were evil is not explicitly stated, but can be inferred from the given information.
Step-by-step explanation:
Sophie's proof that she was good and her roommates were evil is not explicitly stated in the given information. However, we can infer from the provided passages that Sophie's actions and thoughts indicate a belief in her own goodness and a judgment of her roommates as evil.
For example, Sophie says, 'no person touches this paper but me - not alive!' which suggests a sense of possessiveness and superiority. Additionally, Georgiana's statement, 'there needed no proof,' implies that Sophie's belief in her own goodness was unquestionable.