Here's a fact that tends to settle the "when does life begin" question: a 2019 survey of over five thousand biologists found 96 percent agreed that a new human organism begins at fertilization. That isn't theology, it's consensus. The other side made a fair point about moving lines, but that's exactly my point. Heartbeat, viability, sentience, birth, those thresholds keep sliding because none rests on a principle, just a preferred outcome. Fertilization is the one objective, non-arbitrary line. The burden sits with anyone who wants to redefine a living human organism out of the human family.