Which is precisely what I was referring to. "Human life" and "beginning of life (created through human sexual reproduction)" are two ways of expressing the same exact thing. Human life does not start as part of another species and then magically become a human at some arbitrarily assigned point. Nor do philosophy, ethics or law define what human life is.
Basing the ethical and legal definition of a human life on anything but biology is patently retarded.from a legal or ethical standpoint, i.e. the beginning of personhood, rather than simply the literal "beginning of life" from a scientific standpoint.
Obviously the question ought to be "When does a human gain human rights?" but that's not what he said. But to be fair, I skimmed the first page so I may have missed some context. He did seem to reinforce a relative view of human life in post 42 though.
To add something beyond the niggling... Gestation (around 8 weeks iirc) is when all the internal organs are in place and limbs and genitalia are nearly fully formed. This is also the point where a we start calling it a fetus rather than embryo. If there is a need for a bright line, it probably ought to be there.
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