[weegee]

If it is not a child, because it is forming in a woman's innards, and therefore a "part" of her, what is it when it forms in a test tube?

Is it any less human for not sharing the same "experience" as the majority of mankind?

Since the mother's life is not in danger when a fetus is conceived in a test tube or a petri dish, who should decide if it is allowed to live or die? Does the "father" get equal say with the "mother"?

[Dimensio]

If it is not a child, because it is forming in a woman's innards, and therefore a "part" of her, what is it when it forms in a test tube?

I was merely pointing out that what you claimed was an uncertainty in science was actually an issue of semantics, not ignorance regarding observations. I am not taking a position on this matter, because that's just asking for even more trouble.

You asked "Why are scientists so sure of the origins of life when they cannot even "determine" when life begins after a child is conceived?". I am simply pointing out that your question is founded upon a faulty premise.