Most of that goes far over Hermione's head, but she struggles to hold onto what strands she can. Luckily, she's heard bits and pieces of the same song before, so it isn't too hard to keep herself abreast of what Sam is trying to explain to her

"So the good ones don't want to come here? Why? And how do you know the good ones from the bad ones? A bad one can say it wants to help and pretend to be good, can't it? And if it does help.. wouldn't that mean it's good, in its own way? It's not always black and white."