Using intelligence as a metric for determining who is and isn't a human being creates horrible implications for the living

If we draw the line for abortion with the level of intelligence of the baby, what does that mean for those among us with autism, Down syndrome, and all manner of horrible mental afflictions? Do these unhappy men then not have the inherent value the rest of us do? And shall we draw the line with the ability of the baby to feel pain? What then does that mean for those who are in the hospital, on morphine, laughing gas, or some other numbing substance? Is it justified to kill someone who is using one of these? Shall we draw the line with a heartbeat? What does that mean for those who require heart transplants or pacemakers? Are their lives invalid, can someone justly murder them? Or consider drawing the line with the baby's chances of surviving were it to be outside the Womb, and babies may be murdered who are not yet to that point. Does that then mean that those who are in hospitable beds, or on life support, may be stabbed to death in all justice, a fate admirably no less graphic than late-term abortion procedures such as this viewpoint would prescribe? The only logical conclusion to draw, without discounting the lives of countless human beings, adults as well as children, is that life begins at the point of conception. Arbitrarily drawing the line anywhere else creates severe moral and scientific not to mention logical issues that are irresolvable. We must value every human life and fight to protect every human life, no exceptions.