Yeah, I'm guessing that the titans are former humans as well, or at least were originally
created by humans. That still doesn't exactly explain why most of the ones we've seen weren't as intelligent as Erin or the female titan, though.....
Anyway, this was a good chapter. Contrary to some others, I actually
like seeing chapters that focus on character development. I kinda hope that the entire scouting unit (or to be specific, the group Erin is hanging out with) doesn't get wiped out, though..... I think those guys still have a good amount of potential for the story.