An embryo is fully human, as is a fetus, a newborn, a toddler, a child, a teen, a mature adult and an elderly adult.
Our laws are made through a democratic process. These scientists are upset that democracy doesn’t empower scientists to dictate public policy.
What’s remarkable in nature is not so much that nature follows complex patterns, but that it follows any pattern at all.
It’s helpful, as with his Third Way, to begin with a metaphor, in order to get an intuitive feel for the proof.
Our perspective is supported by a rigorous and elegant metaphysical framework, which began with Plato and particularly Aristotle.