Talk:Sans/@comment-27104609-20151028002116/@comment-159.118.31.104-20151111143145

Love and exp are also about Violence. It's the capacity to inflict pain on others.

So it's plausible that Frisk actually thinks of Sans as dead as well. That would probably be enough to give him the boost. Thinking that you killed someone is about the same value. It's all somebody could think of what with no rising kill-count after his death.