a) Can you identify a trait, attribute or other distinctive characteristic that distinguishes all humans from all non-human animals, thereby avoiding both the separation problem and the marginal cases problem (that is to say, something that applies to all and only humans)?

b)Explain whether or not this justifies denying animals a moral status (or one equal to humans) in terms of satisfying Graft's principle of moral relevance.Do you think this principle justifies the analogy between speciesism and racism? Why or why not?

c) Given the numerous ways we use animals, describe one specific way that you use animals in your life. Do your responses to the above questions make you think differently about this?