My phrasing was regarding personhood but I think the same difference in premises applies.And yeah I agree; if I, 96% of Biologists, & the majority of institutions have come to the consensus that Human Life begins at conception and you dont for some reason thats alright.
Yeah I definitely don't affirm this jfl. This is pillar where our worldviews differ significantly. It is self evident to me that the life of a 80 iq fent addict who molested some kid and can't get a job is not equally precious to some politician's kid.And if you also dont affirm that all human life is equally & inherently valuable thats alright. I'm not gonna press you to justify something like that
I'll accept your premise that human life begins at fertilization for the sake of progressing the argument.
Given this I would say the real crux of our difference here is I believe ending a human life can be ethically acceptable if the human is not a person. Especially given the majority of human life (75%) already ends without ever reaching personhood, as we established. With so much ending of life without ever achieving personhood, the value of a human life by this definition would become much less.
Kind of like littering on a planet made of trash. The intention of the action looses meaning in a context where the outcome is already overwhelming and common.
Especially if you can contrast this with a different action like the killing of a person which is no longer a parallel process.