I'm impressed. Lots of good responses here.
Starting with Proteus:
Baruch Brody, Abortion and the Sanctity of Human Life: A Philosophical View (Cambridge, MA: M.I.T. Press, 1975).
"At 40-43 days, the embryo's brain waves can be detected by an electroencephalogram"
Why should capacity to brain waves determine human personhood? Brain death is defined as an IRREVERSABLE cessation of brain activity, rather than a temporary cessation. This is different from the embryo. A developing embryo, has the intrinsic capacity to develop brain waves, unlike someone who is brain dead and cannot be revived.
Secondly, what has to happen before brain waves are produced? Like you said, it takes time to develop synapses and neurons. Do we abort someone at 39 days because they are close, but not quite fully developed?
"Not to forget, that with this argument you schouldn´t treat Diseases, because almost all of them are caused by bacteria which are definitely life,"
Where do I say prolife means preserving all life? My definition of personhood excludes viruses, since they cannot attain sentience, they do not have the inherent capacity to develop sentience.
Now for Jack.
"From the woman's perspective, having an abortion after rape is like being cut free of the wreckage after a car crash."
"It is "immoral" to cut them free, even if they had been wearing a seatbelt, as this would absolve them from the consequences of the risk they accepted."
"to FORCE a woman to carry a hated parasite"
Your example assumes that the unborn are not persons, the point being debated. Why do we cut wreckage? Because wreckage is just metal. Abortion is only immoral if another person is involved.
How is the unborn child then different from you now? Are you completely independent of other people? If not, then by your own definition, you are a parasite.
"These need to be offset against the danger of death during childbirth."
Waited for this point. Couple things.
Just because childbirth may kill me, am I justified in killing someone else to ensure my safety? The unborn child has nowhere else to go.
Suppose a hobo comes on my doorway, in the middle of a snowstorm. Do I turn the hobo away because I'm afraid he may have a knife, and he may kill me? Even if I don't see a knife? Even if I know he will die in the storm if I let him go?
Pregnancy is very safe. Less than 7 and 8 maternal deaths per 100,000 live births in the US according to the CDC.
Urban Ranger-
"Yes, but sex cells don't become zygote automatically either."
Zygotes form after sex. Cells need to be coaxed even when they are cells. A zygote requires nothing other than nourishment and shelter to grow and develop, same as an infant or any of us.
"How does that make a difference? Not all individuals have unique DNA codes."
Right- identical twins are genetic copies of each other, even though they are seperate individuals. Point well taken. The code is human, that is the most important part.
"Besides, infants are already outside, so it's not really applicable to the abortion debate."
If sentience = personhood, non-sentience = non-personhood. If infants are not persons, then we should have no qualms about killing them. That is the relevancy to the debate.
Are you arguing that personhood is based on whether you are inside or outside the womb?
And the toughest for last,
Cyclotron.
"Not a legal responsibility, though. You may think that a family is all about obligations to each other, but the law doesn't see it that way, and this is a legal issue."
"A person's right to life does not, and never will, confer an obligation to help on anybody."
Pregnancy is different from saving a person on drowning in the river. By the time you know you are pregnant, you are already in the river, holding onto the person.
What about negligence? Doesn't a mother have a responsibility to care for her children? Why her, and why not somebody else?
Again, I'll repeat my earlier line, every right has a corresponding responsibility. Just as free speech confers a responsibility on the state to respect the speakers, or freedom of religion prevents the state from closing places of worship, so should the right to life prevent people from killing the unborn child.
Otherwise why have a right to life at all?
Starting with Proteus:
Baruch Brody, Abortion and the Sanctity of Human Life: A Philosophical View (Cambridge, MA: M.I.T. Press, 1975).
"At 40-43 days, the embryo's brain waves can be detected by an electroencephalogram"
Why should capacity to brain waves determine human personhood? Brain death is defined as an IRREVERSABLE cessation of brain activity, rather than a temporary cessation. This is different from the embryo. A developing embryo, has the intrinsic capacity to develop brain waves, unlike someone who is brain dead and cannot be revived.
Secondly, what has to happen before brain waves are produced? Like you said, it takes time to develop synapses and neurons. Do we abort someone at 39 days because they are close, but not quite fully developed?
"Not to forget, that with this argument you schouldn´t treat Diseases, because almost all of them are caused by bacteria which are definitely life,"
Where do I say prolife means preserving all life? My definition of personhood excludes viruses, since they cannot attain sentience, they do not have the inherent capacity to develop sentience.
Now for Jack.
"From the woman's perspective, having an abortion after rape is like being cut free of the wreckage after a car crash."
"It is "immoral" to cut them free, even if they had been wearing a seatbelt, as this would absolve them from the consequences of the risk they accepted."
"to FORCE a woman to carry a hated parasite"
Your example assumes that the unborn are not persons, the point being debated. Why do we cut wreckage? Because wreckage is just metal. Abortion is only immoral if another person is involved.
How is the unborn child then different from you now? Are you completely independent of other people? If not, then by your own definition, you are a parasite.
"These need to be offset against the danger of death during childbirth."
Waited for this point. Couple things.
Just because childbirth may kill me, am I justified in killing someone else to ensure my safety? The unborn child has nowhere else to go.
Suppose a hobo comes on my doorway, in the middle of a snowstorm. Do I turn the hobo away because I'm afraid he may have a knife, and he may kill me? Even if I don't see a knife? Even if I know he will die in the storm if I let him go?
Pregnancy is very safe. Less than 7 and 8 maternal deaths per 100,000 live births in the US according to the CDC.
Urban Ranger-
"Yes, but sex cells don't become zygote automatically either."
Zygotes form after sex. Cells need to be coaxed even when they are cells. A zygote requires nothing other than nourishment and shelter to grow and develop, same as an infant or any of us.
"How does that make a difference? Not all individuals have unique DNA codes."
Right- identical twins are genetic copies of each other, even though they are seperate individuals. Point well taken. The code is human, that is the most important part.
"Besides, infants are already outside, so it's not really applicable to the abortion debate."
If sentience = personhood, non-sentience = non-personhood. If infants are not persons, then we should have no qualms about killing them. That is the relevancy to the debate.
Are you arguing that personhood is based on whether you are inside or outside the womb?
And the toughest for last,

Cyclotron.
"Not a legal responsibility, though. You may think that a family is all about obligations to each other, but the law doesn't see it that way, and this is a legal issue."
"A person's right to life does not, and never will, confer an obligation to help on anybody."
Pregnancy is different from saving a person on drowning in the river. By the time you know you are pregnant, you are already in the river, holding onto the person.
What about negligence? Doesn't a mother have a responsibility to care for her children? Why her, and why not somebody else?
Again, I'll repeat my earlier line, every right has a corresponding responsibility. Just as free speech confers a responsibility on the state to respect the speakers, or freedom of religion prevents the state from closing places of worship, so should the right to life prevent people from killing the unborn child.
Otherwise why have a right to life at all?
Comment