text: in dune (frank herbert), there is the concept of differentiating between humans and "animals". The books deeply explore what it means to be human. It seems that the bene gesserit certainly had a very specific set of criteria in mind in the first book. Later, leto II seemed to adhere a broader definition of what it means to be human. Do you agree? Can you please infer what their  of a "human" and "animal" could be?