geauxtohell
Choose your weapon.
A human egg fertilized by a human sperm can only produce one thing . . . . a 100% human, each and every time.
Developmental stages don't make this unique individual 'more' or 'less' human.
Every hear of a partial and complete mole?
Google it. Your assertion is not correct.
What is a molar pregnancy?
A molar pregnancy happens when tissue that normally becomes a fetus instead becomes a growth, called a mole, in your uterus. Even though it is not an embryo, a mole triggers symptoms of pregnancy.
* Complete molar pregnancy. An egg with no genetic information is fertilized by a sperm. The sperm grows on its own, but it can only become a lump of tissue. It cannot become a fetus. As this tissue grows, it looks a bit like a cluster of grapes. This cluster of tissue is called a mole, and it can fill the uterus.
* Partial molar pregnancy. An egg is fertilized by two sperm. Normally this creates twins. But in a partial molar pregnancy, something goes wrong. The placenta grows into a mole instead. Any fetal tissue that forms is likely to have severe defects.
Molar Pregnancy Overview: Types, Causes, Risks, Symptoms, and Treatment
Moles appear to be a mutation of sorts, something gone awry. If left unattended what will be the result? A complete mole contains no genetic information and can only become a lump of tissue. A partial mole does not develop a placenta and any fetal tissue will have defects. Can this fetal tissue grow and develop without a placenta or will it develop to a certain point then die? If it can survive and continue to grow till term (is that possible without a proper placenta?) then it is the same as a non-partial mole pregnancy, yes? Still 100% human. The developmental stages may differ and it may have severe defects, but it is still 100% human. Unless you believe that because of the defects it is 'less human'?
You are mistaken.
A mole is formed when two sperm from the father (46 XX or 46 YY) fertilize an empty egg (a complete mole) or when two sperm from the father fertilize a viable egg (69 XXY or 69 XY) (this is a partial mole that contains parts of a fetus). It certainly contains genetic material. If it didn't, now growth would happen. If left unattended, moles are high risk for conversion to cancer and never produce a viable human being and are always removed via D&C.
Both also contain rudimentary placentas. The risk of cancer is really from the cells that make up the placenta.
So the fusion of sperm and egg certainly doesn't result in anything that we would recognize as "human". In fact, it is more dangerous to carry a mole than to D&C.
Yet, I don't hear anyone in the streets protesting the removal of a mole. Why not? By your standards, sperm has met egg and tissue is forming. So perhaps we can agree that the term "viability" has meaning in this debate?
This is why the term "viability" goes beyond the silly semantics games that the anti-abortion crowd and why some of us are bewildered by the way people become hung up on certain facets of the issue and not others.