If we can't even agree on a definition of a 'living being' it is superfluous to debate what makes a living being a human being.
Also, are you going to call every woman you meet a murderer, just because she has used contraceptives?
Having failed completely to make any scientific argument for your POV you finally drop the semantics and sophistry and come to the essence of all of your arguments. Emotion.
If we can't even agree on a definition of a 'living being' it is superfluous to debate what makes a living being a human being.
As a scientist, I care little about trying to stretch the definitions of words. My only goal is to describe the physical reality as accurately and precisely as possible. Do not project your desire to change the meanings of words to try to shoehorn descriptions into your preconceived incorrect world view. *I* do not shift the meanings of words.
Cells are alive for as long as chemical reactions are taking place in those cells. When the chemical reactions stop, the cells are dead. Living cells do not feel nor are they aware of anything. Whether those cells are human or come from some other organism is irrelevant. Living human cells do not have any special moral status that makes it wrong to kill them; what makes killing a human being wrong is that the human being has the higher-order physical structures necessary to be aware.
Also, are you going to call every woman you meet a murderer, just because she has used contraceptives?
Having failed completely to make any scientific argument for your POV you finally drop the semantics and sophistry and come to the essence of all of your arguments. Emotion.
That was actually a rhetorical question, meant to make you step outside your preconceived notions and make you think. Obviously, the question failed in its purpose, because you still haven't thought. I will try again (only because it amuses me, and engaging with the unthinking helps keep my thinking skills sharp):
1) The vast majority of women (including most Catholic women) use some form of contraceptive.
2) Some contraceptives (e.g. the IUD) work by preventing implantation.
3) Since you seem to morally equate prevention of implantation with the murder of a living, aware, feeling human being, do you really and truly believe that the majority of women are murderers because of their contraceptive use?