Wow, now you can read the long since passed away minds of the founders to assert that 'born' means viable.
Nope, all I need to read is the plain english of our Constitution, and understand its principles.
"We disagree on when an embryo is constitutionally a human being, correct?" No, not correct. The status of human being is not a Constitutional concept, it is a biological concept. Now if you want to discuss citizenship designation as per the Constitution, I'll defer to your expertise regarding the Constitution. Personhood is a completely different concept that overlaps both the designation as human being and citizenship.