The actual question was when does a baby get human rights, not when does life begin. This is a legal question, not a theological or scientific one. Barry is supposed to be a legal scholar. Which makes his “above my pay grade” answer even more idiotic.
But it's related to the scientific one, because the American legal philosophy is built on the affirmation that "[Men] are "endowed by their Creator with certain inalienable rights," so the question becomes either
Which reminds me of a sharp rejoinder by a friend who, when being informed by a young lady that she didn't know if the child in the womb is "human," remarked, "Oh, dear. If you don't mind telling me ... what was the father?"