Let me state this as unambiguously as possible: a fetus doesn't become a "human being" until it graduates from Ive League with a doctorate.
It's a win-win scenario.
That way... if someone tries to appeal to my humanity... I simply say "Peski hue-mahnz? Go bother the PHD down the street. He knows; trust me! He knows... "
At which point at get to pat myself on the back for being ignorant, since... after all... "Knowledge increases sorrow" and well... acting like a fool is pretty damn easy.
(or maybe I think too much like Sun Tzu)