What if special lines aren’t definite? If legally only humans get recognized as persons at what point do we decide who gets counted as human? It seems so self evident, but a lot of things seem self-evident at first. I don’t think that the body is a reliable site for placing beings into humanity or animality.
How much machine are we allowed to have and still count as human?
The body isn’t a site for determining whether or not a being is human. Our eyes could fool us, even genetics can’t objectively decide whether or not a being is “human.” How can a being be 15% human (the sheep/human hybrids)? What does that mean? That they are 15% of a person? If I replace all of my body parts one by one at which point do I go from human to animal (or machine) (Hmmm… I seem to be channeling a lot of Haraway lately). What does it mean for a human being to discover that they are actually another sort of creature?
How does a Linnaean view of living things limit the ways we look at animals?