While Lenore acknowledges that Dustin was right to bring this information to her, she doesn't seem particularly worried about one of the Haling High students potentially having a fragmented memory about what happened. The human mind, she tells him, is a complicated thing and there are some experiences that it can be reluctant to let go of completely without a deeper and more complex magic. Like the magic in their contracts. She says that the boy is unlikely to remember anything specific or significant without assistance and that anything he does remember will fade with time.