So what would you perfer that the demarcation be?can a fetus have any kind of consciousness if the brain isn't formed enough to sense anything remotely?
4. Fetal pain is difficult to define.
A bit of biology that’s often used to restrict abortions is the claim that fetuses (which form at week 11 of pregnancy) feel pain.
“Pain is very complex,” Swartz says. “It requires not just a physical response, but the ability to suffer as a result.”
Knowing what a fetus experiences is impossible, but brain development studies provide some clues. The experience of pain starts with the senses detecting something noxious. Those signals then have to travel to the cortex, the outer layer of the brain that helps interpret that sensation. In human fetuses, those brain connections don’t exist until about week 24 or 25 of pregnancy. In guidelines written by members of the Society for Maternal-Fetal Medicine, researchers write that these connections are necessary for the experience of pain, but are not sufficient on their own to conclude that pain is possible.
We can't even be identify consciousness in adults. Even the reference you provided said this was impossible.