you have failed to reduce the argument to a state where it is logically or morally unacceptable.
Of course I've answered this many times. I didn't intend to. I was saving us a diversion from having to justify something most people agreed with (or what I thought most people agreed with). There is nothing wrong with doing this, since only controversial premises need extra support. If you had to justify every premise, then recursively you would never get anywhere.
You constantly appeal to what people might already think is right or wrong, without actually forming a logical case for why you or I *should* believe it to be moral.
Don't know what you mean by "constantly" appealing. The only time I recalling doing anything like this is in the case mentioned above. But even then I was only appealing to what people already believed, or what I thought they believed. The rest of the time I have argued why the pre-born are human. Sure I have assumed that it is wrong to kill humans, but again that was not being challenged, only the minor premise was.
My questions:
1] If toddlers are a step in the progression of development, doesn't that make it *worse* to kill them than something less advanced along that path?
It may result in worse consequences, yes. But minimally immoral is still immoral. If I kill person A who is a homeless loner, I have done something immoral. If I kill person B who is a father of many, I have done something worse (by harming more people). However, in both cases an immoral act was committed. If you ask me which is worse, I’d concede that killing person B. But that doesn’t mean killing person A is okay.
2] You admit that the circumstances behind a toddler's death are likely to be more traumatic, yet refuse to call it any more or less immoral. Don't you believe that the consequences of an action are at all a consideration in its morality? Is not killing a child when you know it is most probably going to draw its mother and family into bouts of depression and suicidal tendencies more immoral than killing a child when you know its death might actually save lives and not have traumatic effects?
I think I answered most of this above, but I’d add this: Consequences are considered, but not primarily. Weighing consequences primarily only pushes the question of goodness to an evaluation of the type of consequences we find good. How do you justify the utility principle of say, happiness or whatever you wish to say constitutes a "good" consequence...by it's consequences? Though important to the present discussion, it would be off-topic to discuss it in detail. Perhaps a new thread?
3] Thirdly, by seemingly failing to take heed of morality as dependent on consequences, it seems you are only left with asserting some teleological ethics system.
Actually, consequentialism is also a teleological system. Perhaps you mean “deontological†system? But as I mentioned above, I don't ignore consequences.
Yet you never give a good explanation for why your system is rational and how immorality is automatically bestowed upon the act of abortion.
First of all, my argument style has only attempted to exploit pre-existing beliefs of people to show why it commits them to the belief that abortion is immoral. If you believed that killing humans is wrong (major premise), and you believed that the pre-born are humans (minor premise), then you should believe that killing the pre-born is wrong (conclusion). Just because I don't justify the major premise doesn't mean I "failed" to justify it. I am working with where people are. Further, while I think that putting a full ethical system together is interesting, it is not as important as getting people to stop aborting babies. So if people already believe the major premise, it would be foolish to open up the can if my objective is to convince people of the conclusion. I would think that as a consequentialist you would embrace this method. Incidentally, premises only need support if they are reasonably challenged. If a premise is common knowledge, then justification is not necessary, or at least it is not considered a deficiency of the argument if support was not provided. Prior to your entry into the conversation, the topic was about the humanity of the pre-born. It was reasonable to ignore the other issue since it was taken to be uncontroversial.