Where did I say that?
I just said that
sanctity isn't a moral concept. It's an explicitly and solely
religious concept.
Secular humanism can come up with all kinds of justifications for defending human lives without resorting to words like
sanctity.
You said this before, and it
really isn't true. Yes, social cohesion is coded into humanity's drives. So is violence and murder. Murder predates humanity, too. We were never a bunch of peace-loving hippies, dude. We're alpha predators.
But the harm is not to
my thumb. The harm is to
me. And if I have a sixth finger, I can absolutely have it surgically removed.
When there's measurable, coherent brain activity.
Before that point, the fetus is essentially brain-dead. Even once that coherent EEG activity emerges, it isn't a given that it
definitely means there's a person in there, but we can't be certain there
isn't. Whereas, before that activity emerges, we
can be certain there is no person there. The same way we already make that determination in cases of brain death, in actual people. The exact same measure. If we can use the lack of brain activity to determine that someone is medically dead, and cease to be a person, then surely we can use it to determine the point where they
become a person.
http://www.wired.com/2011/02/baby-brain-activity-sleep/