I think the standard should be measured scientifically. We do not grant rights to animals, and at the early stages, the human foetus is no more complex than an animal, or animal foetus.
Of course, it may be that animals need more rights, rather than human foetuses needing less.
The standard isn't pain, because a slaughtered animal probably feels some pain too, and that doesn't make it illegal.
Legal doesn't automatically imply moral. While it is certainly legal to kill animals in certain circumstances, that doesn't mean it is right to do so.
By your argument, the law is automatically right, whatever the law says. But on the contrary we have a moral duty to question unjust laws.
The only problematic thing about this standard is that it would extend rights to other animals with a highly developed cerebral cortex, such as dolphins, whales, and apes...
That would be a desirable outcome, not a problematic one. It is perfectly logical to treat like as like.
Okay, so according to your #1, the sliding scale permits abortion in a 3 week old, but not in a 8 month old?
In general, yes.
Do you think it is morally right for the woman to be able to decide what she wants or is best for her life at all stages of pregnancy, including right after birth? In other words, if the woman is able to decide what she wants or is best for her life, meaning she can choose to kill the fetus before it is born, does she have the same rights after it's born? What's the difference between killing a fetus a day before it is born, and killing a newborn a day after it is born? aren't they almost essentially the same fetus, the only difference being one is inside the womb and the other got lucky by a day or two and is already out?
I would have the same problem with the woman killing a fetus the day before it is born naturally as with her killing it the day after birth. At either of these times, the baby is viable for life independent of the mother outside the womb. The same cannot be said at much earlier stages of pregnancy.
Those are good questions. Probably enough to decide the matter if they could be answered. My personal belief is that human life is protected, not all life. This is why we raise cows for slaughter, it's not wrong to kill a cow because it is not human life, just life.
What makes human life so special, in your opinion, such that we need to grant a whole different set of rights to life to humans compared to cows?
Now the question of when life becomes human to me is best answered by your first question, when can it think. Because cows feel pain like humans, but they are not human life, they cant think in order to complain about it, if you want to be black-and-white about it. So when you're able to think, and I guess complain about pain, you are considered human life?
You think cows can't think? Are you familiar with cows? Have you ever spent any reasonable length of time with them? Individual cows are as individual as you or I. They aren't unthinking robots. They have desires. They like some things more than others. They enjoy being alive, I can assure you.
what about potentiality? does having the potential to be human essentially the same as being human?
Is having the potential to get a driver's licence the same as having one?
One must be careful as to how we define "human" and how we define "21". The rights that one gets upon becming a human are a subset of the rights that one is granted upon turning 21 (in America, the age where one can buy alcohol). I though it was clear that we were talking baic human rights, vs. the ability to drink alcohol.
So, are the rights one gets as a foetus in the womb a subset of the rights one is granted at birth? Or not?
Can one's status as a human be revoked? That is, if you go into a comatose state, should your human rights be revoked?
The relevant moral category, many philosophers would argue, is not humanity, but personhood.
It is
persons that ought to have moral status, not
humans per se. Limiting yourself to humans denies the possible existence of other persons. Moreover, a single-celled embryo is human, but not yet a person.