"You have a religious conviction that life begins at conception, and while it may, that does not mean that it is cognizant life. Until it is, it is not killing a human being; it's just preventing it from becoming one. Since we have a separation of Church and State, your religious views on when life begins cannot be used as a register as to when life begins.
Now, if you want to argue against late term abortion, when even the scientific community would agree that we are talking about killing a cognizant life that might even be able to make it with a little help outside of the womb, now you have a real argument."
Personally, I have a legal conviction that a fetus is a human being who has a right to protection under our legal system. If you are pretending that there is a consensus of opinion among the scientific community as to when life begins - you are fooling yourself. SCOTUS established a legal definition of when life begins and that legal definition can (and imho should) be modified.
"Cognizant" has no bearing at all. koshergrl certainly doesn't fit that description, but it would STILL be wrong to kill him or her.