The Following Post Deals With The Abortion Thing, Just So You Can Skip It If You Don't Care To Keep Reading About ThatExcept I never claimed to state the truth about what a human is. And yes. A blastocyst needs it's environment, but it is already there and will work on a automated system. None of my cells will. The key difference can be in obnoxiously difficult condition. You're not talking about cells in my body. You're talking about cells taken from my body and painstakingly work upon and nurtured and put in a environment where they will thrive.
How can you not seem the innumerable differences here? Each and every one can be used as the justification.
No, you didn't, but your post was in defense of one particular point of a person who did. You might not hold that particular viewpoint, but it was a convenient quote for me to use to discuss that particular point, and since you did specifically refer to it, it seemed fair to challenge.
That key difference isn't that much of a difference. Will the blastocyst be fine if the woman stops eating?* Does external fertilization create non-humans? At what point does effort become so "painstaking" that the potential creation no longer counts as a human?
If painstaking work is the key difference, does that make the offspring of a rapist who methodically stalks and attacks a woman more of a person than that of some guy who just hooks up with her at a bar?
If we have an answer to the question of "When does life begin?", those should all be answered. My entire point is that it is either undefinable or so difficult to define that it hasn't happened yet, which I actually get the impression you agree with.
*Let's go further. If we only know that the blastocyst was a person because an automatic process would carry it to a state we obviously refer to as human, do miscarried ones retroactively become non-persons? That's some pretty interesting violation of causality, there.