Humans are too good at it. They seem to think how they don't kill is what makes them different from us, but that's not entirely true, is it...? Not that us is the same in meaning for you and me, but I know I - didn't feel doubt for an instant when I had that poker in my hand. It's that they can lie... fake emotions like... indignation...

When they were reading Rin's computer and so upset about her scheme against Susan just for a guaranteed hit song - I saw their logic about the number of murders but didn't disagree with the motive. That is after all her own raison d'etre.