Please read my comment on post 1.
There is no "when". Death is not an instantaneous event. It is a continuous process. It involves billions of chemical events over a period of time.
Don't be tricked by The Beard!
"There is no "when". Death is not an instantaneous event. It is a continuous process. It involves billions of chemical events over a period of time."
Fair enough. So you're saying that a person who commits murder isn't guilty of murder because the victim isn't really dead? I didn't think so.
Your original statement -- life has no beginning or end, or something similar -- is a red herring in the abortion debate. Even if Life (with a capital "L") has no beginning or end, from a legal, social, and moral standpoint human life (small "l") does have a beginning and an end.