You haven't offended me at all. I've merely pointed out that you've argued from the absurd with religious zeal. It's quite obvious, yet not offensive. It makes for a waste of time in discussion, but isn't offensive.
As a doctor, I'm sure you know the generally accepted definition of differing cell types. That a zygote is neither sperm nor egg, thus it is a completely new, genetically specific, and genetically human cell. The fact that the zygote goes through internal changes that prevent other sperm from entering--these internal changes prove that it's a living cell. Thus, we have a genetically specific, genetically human, living cell. A separate, genetically human life has begun. It's not a scientific question at all. It could be a religiously zealous denial. But it's a scientifically settled matter.
I'm sure, as a doctor, you understand the accepted definitions and distinctions between cells and organisms. In lay speak, its a living system of interrelated and subordinate properties working together for a predefined purpose. Since there is no factory in the mother/host producing organs, limbs, etc for the embryo, and all of these are developed from the zygote forward, it is scientifically defined that as far back as the zygote, a genetically specific, genetically human organism, which was alive since the single celled level, and is alive to be orchestrating the system of its own development, has formed.
Thus, as early as the zygote level, the genetic and scientific definition of a living human organism has been established.
To say, "people disagree so we really shouldn't set a line on this" is ridiculous logic, by the way.
Good evening doc.