it is always immoral to intentionally kill an innocent human being [against their will] if it is a certainty that they will be killed
Okay, I am going to start moving away from this thread now. We can try to tie up some of the loose ends as best as possible...
If you cannot bring yourself to analyze the way that something evil becomes acceptable when it is merely a foreseen effect, then you will not be able to assess cases like the trolley case, for you will have no principled way to distinguish an effect that can become acceptable from an effect that cannot become acceptable.
In these sorts of claims you continue the strange move whereby you reduce indirect intention to mere intention, contrary to Le1
Again, I have already addressed your equivocation between a cause and a means in detail in <this post> and <the following post>. You never responded to those posts, and I'm not sure if you even read them
And what could this sentence of yours possibly mean? Give one example of a potential means, if you think your distinction is coherent.
This is incorrect because your "per accidens means" has nothing to do with the direct/indirect intention of Brock's. What you apparently mean by "per accidens intention" is any intention that is not identical with the "primary intention." Else you should clarify what you mean by a per accidens intention.
If someone chooses or pursues A for the sake of B, then per se he pursues and chooses B, and A only coincidentally. But when we speak without qualification, we mean what is per se
This goes back to the problem about the distinction between natural necessity and logical necessity. If a tyrant says, "I will rape this woman if you drive to the grocery store," then is it permissible for me to drive to the grocery store? Of course it is.
In the trolley case the death of the one falls under (indirect) intention not because pulling the lever is a means to their death. I repeat, it is not indirectly intentional because pulling the lever is a means. The reason their death is indirectly intentional is because it is an effect of the cause of pulling the lever, and that cause is intended.
There is no reason at all that we should be talking about the word "means" when it comes to the relation between the lever and the death. Again, a cause is not the same thing as a means.
Okay, interesting. What if there is an 80% chance, say?
If I were teaching philosophy I would not allow my students to examine the trolley problem until we had studied causality, intention, and responsibility in depth.
1. There are no moral facts (facts about the goodness of different acts, people, events, etc.)
the point is that there is a large difference between an intended effect and a foreseen effect.
For Anscombe the Cartesian approach to intention is more or less the idea that one can simply and straightforwardly choose which effects of their act to intend and which effects to not-intend.
All directly intended killings of this sort are impermissible, and this is what we call murder or killing simpliciter. As to indirectly intended killings, some are permissible and some are not.
When one aims at an end uses a means with two effects, one of which is to the benefit of the end and other merely accidental, then their act of using the means is an act simultaneously towards both effects — Bob Ross
So you are engaged in the use of that word "means" in precisely the dubious and misleading way I explained above. I have explained this many times, so I don't feel the need to do so again.
The question that is being begged is whether a foreseen effect is a "doing."
Here is what you need to address if you want to deny double effect:
Stay with what I already wrote. Is it or is it not morally prohibited to directly intend these emissions? That is the first question you need to consider.
The hypothetical is physically impossible. In that situation you simply do not have sufficient time to deliberate. If one wants a case where there is sufficient time to deliberate, then they will need to cook up a new hypothetical.
As a remote intention they may be trying to land somewhere with no people, but practically speaking they may foresee the effect that at least some people will die. In that case they are trying to minimize death and injury.
That's not what "ideal" means, and that's why your definition fails.
Edit: The contentious claim you are making is something like <There is no morally relevant difference between direct intention and indirect intention; between an end and a foreseen effect>.
Eh, I think I’ve changed my mind again. :lol:
"I accept a relatively uncontroversial form of double effect whereby the unintended effect must only be possible and not certain"
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That is, it is too intentional, even if it is, strictly speaking, indirectly intended
After reading a book by Kevin Flannery a few years ago I became convinced that it is not permissible to pull the lever in the trolley case.*
Flannery shows that Anscombe’s critique of “Cartesian intention” is correct, and that circumstances are always relevant to moral questions.
That is, it is too intentional, even if it is, strictly speaking, indirectly intended. This is basically what you yourself have been saying.
The case where the car is about to hit four people is artificial in the sense that it conflates a case where there is almost zero deliberation with a case where we have ample time to deliberate
But in the airplane example I think the pilot does need to aim at the area with least people
Always good work from Bob, I have been able to grasp my own thoughts a bit better through your exchange with Herg in here. Thanks for all the work and intel you share consistently, it is appreciated. Many others to be thanked in this from me as well, good stuff all around. Cool.
I was traveling today and so I listened to a recent talk by a good philosopher, Kevin Flannery (who is not the best public speaker). He talks about the way that Aquinas views the relation of the means and the end at 18:08-22:19, which is what you are speaking about. (For the whole section on Aquinas' view of intention, see 17:41.)
You are building your definition around a noun, 'ideal.' Even on your redaction, the Google definition is still built around something that directly refers to the verb of acting, "a course of action." The genus of intention is acts, whereas the genus of ideals is ideas. An intention is some kind of act, not some kind of idea or ideal. This may seem like a quibble, but it's really not, as many people make this mistake about intention.
The idea is that the intention of the means and the intention of the end are both separable and inseparable. We can view them under different aspects, but to say they are entirely separate is not correct.
Flannery speaks of the means as, "The things [the agent] believes or hopes will lead to [his] end."
You have missed the distinction between a potential means and an actual means. Go back to my tennis racquet example. Before I begin playing the three racquets are each a potential means to playing tennis. Once I choose the Wilson racquet and begin playing, the Wilson racquet is an actual means to playing tennis. A potential means is that which can be used to realize some end. An actual means is that which is used in order to realize some end.
Our whole proximate goal is to distinguish a means from a foreseen effect
for example by pointing to the fact that the car's polluting emissions are not a means to getting groceries, but they are a foreseen effect
So then you tried to make a distinction on intention to clear this up, with "essential intention" and "accidental intention." But now you say that both a means and a foreseen effect are intended per accidens,
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Right, and you don't yet have the tools to even see the difference between a means and a foreseen effect. At this point it is invisible to you
If your car is essential to actualizing the intention (i.e. it is an essential means) then it is not right to say that the car is "unessential to the intention which I have."
To say that "it could be an actual means towards Q [but in this case it is not]" is just to say that it is a potential means towards Q. That's what a potential means is.
No it's not, because for Brock an actual means is directly intended
No, this is a case of negligence, and is quite different from what we are considering.
Regarding this third wall, suppose there is an evil and it is morally impermissible to directly intend this evil. Does it follow that it is impermissible to indirectly intend this evil?
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I think not. Take the matter of the especially bad car emissions due to a faulty exhaust system. Is it impermissible to directly intend those emissions? For example, to allow your car to idle for the sake of the emissions? I think so. Does it follow that it is impermissible to get groceries in the car, even when you know it will produce those emissions? No, I don't think so.
But the moral compass is off if you think that, all other things being equal, you must sit idly by when you could save some people from dying
it is intention that most of all makes one a moral agent, not the act.
This begs the question between us, which is whether killing Alan and Betty is an immoral act if it is the only way of saving the lives of Charles and Dora.
How do you know which actions, on the one hand, are immoral, and which, on the other, are permissible or obligatory?
You need to work that out first, and then that will tell you whether someone is a moral agent or not. So actions are more central to normative ethics than being a moral agent.
To put it starkly, 'intend' is a verb whereas 'ideal' is a noun.
An intention of the end can be more or less essential depending on how it relates to my telos and my will; an intention of the means can be more or less essential depending on how it relates to my intended end, etc
I would say a means is NOT an intention; but means can be intentional. — Bob Ross
So if you intend to quench your thirst and you begin filling your glass at the faucet, you would say that you did not intend to fill your glass? Filling your glass is a means.
Colloquial we use "means" in two related senses: actual means and potential means.
Walking into the kitchen is an actual means, and quenching your thirst is an end, and both are intended. I was asking about the relation between the actual means and the foreseen effect, not the relation between the end and the actual means.
The problem is that you are falsely implying that A is an actual means to Q. I would rather say, "a foreseen effect of a chosen act is indirectly intentional."
Nevertheless, Q falls under the agent's intention because it is accepted as a known consequence of his action. But sticking with Brock's language, we can simply say that Q is indirectly intended.
We agree that Q is indirectly intended, but I would not say that he means to bring about Q, nor that he is required to achieve Q. I would not say the first because A is not an (actual) means to Q, and I would not say the second because it is not an accurate use of the word 'achieve'. I would say that he is required to accept Q, not achieve Q
Indirect intention does involve a kind of absence of intention. Involuntary manslaughter does work that way. Negligence is a form of indirect intention. The trolley lever-puller might be charged with involuntary manslaughter, but they would not be charged with murder.
So the first wall of your castle was the idea that a necessary condition indicates a means, and we have overcome that wall. The second wall is the idea that A is a means to Q, and I think we are close to overcoming that wall. The third wall is now in play, which is the idea that A is impermissible because Q is indirectly intended.
In the case of Alan, Betty, Charles and Dora, where the driver let Charles and Dora die by not turning the wheel, can we at any rate agree that you consider the lives of Charles and Dora to be less important than obedience to the rule that you should not kill an innocent person by positive action?
So we either fail to treat two people as ends, or we are complicit in the failure to treat millions as ends.
Okay, fair enough, and this is a good post. I will offer a few more posts, but I don't know how long I will stick around. I was limiting myself to the "means" question in large part because I don't have time to get drawn into all of the other related topics.
Somewhat, but I would not call it "an ideal."
"The end is first in the order of intention; the means is first in the order of execution."
My essential or per se intention is that which adheres most closely to the aim that my will has formed.
As a metaphor, the fastest and most efficient route to the grocery store adheres most closely to my end, my intention to get groceries.
The danger here is attaching intention too strongly to ends such that it becomes unattached to means
. You have an intention to quench your thirst but you also end up forming an intention to walk into the kitchen
Means and ends are both kinds of intentions
do they become equal parts in the intention of the end?
This is what Brock means by direct intention vs. indirect intention. A means is directly intended whereas a foreseen effect is only indirectly intended.
A is a (chosen) means to P, and Q is a foreseen effect of A, but does it follow that A is a means to Q?
This is where it becomes important to recognize that a means must be appropriated by a volitional subject in order to truly be a means.
1. "He means to achieve P"
2. "He means to achieve Q"
3. (both)
[4. “He per se intends P, and per accidens intends Q” ]
If Q is merely a foreseen effect then he neither means to achieve Q, nor does he mean to not-achieve Q. The fact that he does not mean to achieve it shows that it is not directly intended (in Brock's language). The fact that he does not mean to not-achieve it shows that it is indirectly intended on the presumption that he chooses/intends A. If he means to not-achieve Q then he would not choose/intend A. As I said above, "Supposing !(A → Q), would I still choose A?"
If A were a means to Q, then you would say that A is useful for some intention (with respect to Q). But what intention is that? The intended end is P, and A is only intended because it is a means to P.
A is "a means" to Q in the abstract sense, but it is not a means that you appropriate via intention
Throughout you have been making dozens of very minor mistakes which I overlook for the sake of time. Here is an example of that. Your first clause is technically true, but the description is inaccurate. Action A (swerving) is not done "to kill two people to save two other people."
So the whole point of my conversation with you is to demonstrate that a means and a foreseen effect are both intended, but in different ways!
Is it always wrong to accidentally-intentionally kill innocent people? More precisely, is it always wrong to indirectly intend to kill innocent people? Is voluntary "manslaughter" always negligent?
Another thing that we haven't directly delved into is the difference between causal necessity and logical necessity.
This relates to intention because indirect intentions and per accidens causality tend to go hand in hand. The closer to per se causality an act approaches, the less plausible is the idea that the effect was not directly intended. For example, it makes some sense to say that you pulled the lever without (directly) intending to cause the person's death, but it makes no sense at all to say that you pulled the lever without intending to switch the track
For example the lever-puller will say that they merely let the single person die in order to save the five
To intend and cause the death of someone is to intentionally kill them
It makes no sense for you to say that you intend and cause their necessary death but you do not kill them.
Edit: If Bob Ross were right, then one would have a magic get-out-of-jail-free card for any moral quandary: just do nothing
Now I should say again that your definition of a "means" is not a good definition.
"something useful or helpful to a desired end."
One of the fundamental problems here is that your account is unable to distinguish between the "V" and the "7" in my diagram. So then either 1) There are no relevant moral differences between "V" situations and "7" situations, and therefore your inability to distinguish them is unimportant, or 2) There are relevant moral differences between "V" situations and "7" situations, and therefore your inability to distinguish them is problematic.
So it would instead be, "Q is not a means to P in 'V' because if one disconnects Q from A then P is still connected to A." Note that Q is not a means because it does not mediate A and P.
Let's get back to fundamentals again. There are two basic principles in conflict:
• Pdfs: The principle of the diffusiveness of intention
• Pndiv: The principle of the non-divisiveness of intention
You seem to be committed to the position which says that when I drive to the grocery store I am intending to consume fuel. This isn't correct. I intend to get groceries, and the consumption of fuel is a side-effect that I would prefer not occur. I only assent to it because I don't know how to get to the grocery store without consuming fuel.
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if for some reason fuel is not consumed during my trip, the trip is successful all the same. If I get back to my home and see that the fuel has not been diminished, I do not say, "Oh no, my purpose was not achieved!"
Remember that the key is the relation between P and Q.
But again, to know whether Q is means to P we must understand the relation between P and Q, and the conditional necessity that you are betting all your chips on is represented by (P → Q).
So first, A is not "swerving to save four people." Saving four people is impossible, and we do not intend the impossible
Now, an easy way to understand the flaw in your reasoning is to reflect on your 7 diagram; because it implies that if you were to remove P that Q is still connected to A, which is not true, for example, in the case of the car swerving example. If A is “swerving to save four people” and P is “saving four people” and Q is “hitting two innocent bystanders”, then removing P does not result in A → Q. Viz, if the intention is to save four people, then the effect of hitting two innocent bystanders is no longer connected with the intention in the event that there are no four people to save.
Now if we are aiming at Q then we don't need to achieve P (although we could). So we can remove P without removing Q. But in fact we are not aiming at Q; we are aiming at P, and Q is not a means to P as
↪Herg
so helpfully demonstrated.
The central point has to do with whether Q is a means to P.
If you want to say that Q is still intentional killing even in the "V" case then that is a separate argument from the claim that Q is a means to P
• A "means" is asymmetrical. If A is a means to B, then B cannot be a means to A. Two things cannot be a means to one another.
"Supposing !(A → Q), would I still choose A?"
I would prefer we just refer to it as intentional killing vs. killing: that is the most clear way of presenting it. — Bob Ross
Yes of course you would, for that would aid your position. Likewise, I would prefer if we just refer to it as killing vs. non-intentional killing. So again, I suggest we not use the word "killing" without a prefix.
I didn't say not turning the wheel was an action, I said it was a choice, so it is not true that I am "confusing decisions (or choices) with actions". You are changing what I wrote. Please don't do that.
I don't agree that it is UNCONDITIONALLY immoral to intentionally kill an innocent human being
As I've said, I think it is morally acceptable if either one has no other choice, or it is done in order to prevent a greater wrong.
This is perhaps the essential bone of contention between us. I think we owe each other an explanation of why we take the positions on this that we do. I will start by explaining why I think the way I do.
I am an ethical naturalist and hedonist
I believe that the only intrinsic good is pleasure (strictly, pleasantness), and the only intrinsic evil is pain (strictly, unpleasantness)
From the fact (as I see it) that pleasure and pain are the only intrinsic good and evil, I derive the more or less Benthamite view that the entities that have moral status are all and only those entities that can experience pleasure and pain. These are therefore the entities we should treat as ends, not as mere means.
We do not treat an entity as an end if we kill it without good reason. We also do not treat it as an end if we let it die, when we could save it, without good reason.
The mere fact that letting an entity die does not involve physical action, whereas killing an entity does, is not a good reason, because the only intrinsic evil is pain, and the good (i.e. pleasure) that that entity would have experienced is equally lost either way.
I would now like you to tell us the reasoning that leads you to conclude that it is UNCONDITIONALLY immoral to intentionally kill an innocent human being.
The floor is yours.
When you say that 'eudamonia is the highest moral good' is the ultimate underpinning, do you literally mean that nothing further underpins that? Because if so, then I must ask you, what reason do we have to believe that the proposition 'eudamonia is the highest moral good' is true?
It doesn't appear in my view because I don't think it is morally significant.
He has two choices: if he doesn't turn the wheel, he will kill all four, whereas if he turns the wheel, he will only kill two. To kill four is worse than to kill two, so he turns the wheel.
The point is that not turning the wheel is just as much a choice as turning it
You are trying to say, “If in causing P I necessarily cause Q, then Q was a means to P.”
A: Give water to the first person
• P: The first person lives (because of the water)
• Q: The second person dies (for lack of water)
If we look at the quotes from your previous post, we find that you must hold that Q is intentional killing, because you must hold that Q is a means to P
In the water case, without the second person dying for lack of water, one cannot avoid the death of the first person. P cannot be achieved without Q. Therefore on your reasoning, Q is a means to P, and is therefore intended.
3. Hitting the two people to save the five is an action which results in the deaths of the two; which is thereby an act of killing (as opposed to letting them die). — Bob Ross
In the water case, depriving the second person to save the first is an action which results in the death of the second person. On your reasoning, this is an act of intentional killing, where P cannot be achieved without Q.
2. (A → (P ^ Q)) → (A → (P → Q))
The other absurdity that results from your view is that Q is a means to P and P is a means to Q
By murder I mean intentional killing, and by “causing death” I mean killing that is not necessarily intentional. The simple word, “killing,” is completely inadequate to our purposes given its ambiguity with respect to intention. I suggest we avoid using that word unless we prefix it with “intentional” or “non-intentional.”
If you are right, and the killing of Alan and Betty is required in order to save Charles and Dora, then that must mean that if Alan and Betty had not been there, the car could not have swerved and saved the lives of Charles and Dora.
BTW, I hope it is clear that you can give up the belief that the killing of Alan and Betty is a means to saving the lives of Charles and Dora, without also giving up the belief that it is wrong to kill an innocent person. I agree that it is wrong to kill an innocent person, except in circumstances where it cannot be avoided, or where it is necessary in order to prevent some greater wrong
Okay good, but the key thing you need to do is explain the case in which Q is not intended. Are you saying that it is not intended whenever it is not a means to P?
This business about judging one's responsibility for an omission vs. a commission comes from my charge that the pilot's omission of ceasing to fly the plane is a culpable omission.
A: Some action done by P1
• P: Some effect
• Q: P2's death
Did P1 kill P2?
Or to be more precise, did P1 intentionally kill P2, or else did P1's action merely cause P2's death?
So I propose we avoid the verb "kill" altogether, and talk about murder vs. causing death. "Murder" isn't a perfect word, but it's better than anything else I can think of.
Your argument is that <A means is a necessarily utility expended to produce an desired outcome; Q is a necessarily utility expended to produce an desired outcome; Therefore Q is a means>.
This is unwieldy. I like @Herg's definition better:
A means is something that facilitates or enables the performance of some action.
Now Herg's point was that pulling the lever is what enabled the person to save the five, and killing the one person is not what enabled the person to save the five, and I agree with him.
A point that Herg and I have both made is that a clear case of using one as a means to save five occurs in the hypothetical where one person is killed so that their organs can be transferred to five people in dire need of an organ transplant. When this case is compared to the trolley case, it is clear that the death of the one is a means in the transplant case but not in the trolley case.
The problem with this analysis is that to discretely decide to continue sitting is an act. It is a decision to omit standing. If someone decides to omit an act then they have acted, by deciding to continue in the course they were already in. But again, I am going to leave this omission vs. commission question for another day.
I actually have to run, so I am going to post what I have so far and return to this tomorrow. Most of what you say relates to the omission vs. commission question, which I think is better left for later. Still, I will try to revisit anything I have missed in your post. Hopefully what I say here will be enough to go forward.
Actually I think Bob is taking the straightforward position that it is always wrong to deliberately kill an innocent person. If I understand him, he regards this as an absolute moral truth, completely non-negotiable, so that 'you must not deliberately kill an innocent person' is a moral imperative that admits of no exceptions, however bad the consequences of obeying it. He will no doubt correct me if I have misunderstood him.
If I have understood him correctly, then I would like to ask him what, in his view, underpins this truth? Does he, for example, think that it is a moral truth because God makes it so?
So for the car:
• A: Swerve right
• P: Avoid hitting all four people
• Q: Hit the two people on the right
Here you are actually responding to my counterclaim that if the pilot ceases to fly the plane he intentionally kills:
• A: Cease flying the plane
• P: Avoid actively killing anyone
• Q: People will die
I think what is happening here is that you are hoping that the deaths that occur via the pilot's omission are better than the deaths that occur via the pilot's commission, even if more people end up dying on the omission. But Q still occurs on the omission, it does not go away.
Herg’s point is that the death of the one is not a means to the saving of the five, and we know this because something could happen where the one frees himself from the track and the five would be saved all the same. This is completely different from the transplant case. In that case if the one frees himself and does not die then the five do die. In one case the bad effect is a means, whereas in the other case it is not.
This would be true if the second supposed means was, in fact, needed to save the five; but as Leontiskos has pointed out, it isn't:
"Killing one person to save the five is what enables the person to save the five. "
This is false. Suppose at the last minute the 1 person rolls off the track and saves himself. The operator has still managed to save the other five, and that is because it was using the lever that enabled him to save them, not the presence of the other 1 person. The means is the same whether the 1 person is killed or manages to save himself.
"Without being able to kill the one person, they cannot save the five."
If you mean that they would be unable to save the 5 if they lacked the ability to kill the 1, that is true. But this is not because the 1 is the means of killing the 5, it is because to be able to kill the 1 person they need to be able to switch the train, and it is this switching that is the means of saving the 5, not the killing of the 1.
Yes - I’ve changed my mind regarding the trolley case. I now hold that pulling the lever is permissible if the conditions of double effect are being adhered to.
This is instructive because you speak about "committing an immoral act for its own sake." This is obviously not what is happening any any of the scenarios. Not even someone who does evil for the sake of a good end is committing immorality for its own sake. :chin:
I would say that they don’t intend it in different ways, because both have the purposeful course of action of sacrificing one person for the sake of others.How? Both situations have a person who knows they have to sacrifice someone to save someone else, and they act upon it. To me that is a sufficient condition to say they intended to do it. — Bob Ross
They don't intend to do it in different ways? Again, on your principles to cease flying the plane is to intentionally kill.
I am seriously struggling to see how the police officer would not communicate in their report, just based off of your statement to them here, that you intended to kill the guy on the shoulder to avoid hitting the two on the median; and this is essential to your argument that you provide a basis against this. — Bob Ross
I brought up murder because it is obvious that this person would not be convicted of murder. They may be convicted of manslaughter, but not murder.
So, this just boils down to the hierarchy of moral values. I think that rights are more fundamental than social duties (like flying airplanes, driving buses, etc.): the latter assumes the duty to protect and are birthed out of the former, so the former must be more fundamental. — Bob Ross
But this doesn't answer the question. If I have a duty to not-kill one person, then why don't I have a double duty to not-kill two persons? At stake are two duties.
I am going to come back and make a full response when I have more time
According to what you say here the driver should be convicted for murder, no? You seem to think he murdered the pedestrian on the shoulder.
You didn't strike me as one to believe in fate. So because one innocent person would die if you saved five people, you would let the five people die because other forces that are already in motion would lead to their death. If that is your answer, how do you arrive at that decision?
Does the pilot have "a separate but related duty to cause as few deaths as possible in the event where he cannot avoid causing deaths"?
So I am wondering if they have a second duty at all. If they do then we have a case of what is sometimes called moral perplexity, where two duties come into conflict.
Presumably you are saying that the relevant difference between the airplane and car scenarios is that in the car scenario all of the potential victims were initially in the path of the vehicle?
It's not at all clear that the same thing is happening in the car scenario.
If someone is on the shoulder, and I hit them, and I knew I was going to hit them, it does not follow that hitting them was a means to avoiding the others. The circumstances here are very different from the transplant case. In the transplant case two literally need to die in order to save the four. How do you differentiate these two cases?
A police officer might investigate and ask my why I swerved. I might say, "I swerved to hit the guy on the shoulder, because I knew that if I could hit that guy on the shoulder then I would be able to avoid the two on the median."
you would have to sufficiently demonstrate that swerving to hit two people instead of four is based on the intention to hit those two people to save the four. What say you?
The plane/car will cause the death of innocents no matter what, and therefore the first act is inevitable, and one is not responsible for the inevitable.
(Again, I have no idea how I would square my own reasoning with the trolley :lol: )
Why is B a more important duty?
Interesting. So if we have the trolley problem, both sides have innocent people, and both sides plead for you to save them by throwing the switch or walk away, what would you do?
This is a completely different scenario though witli different connotations where you are introducing another malevolent agent who you are bargaining with. This makes the scenario a lot less straightforward. You have also completely complicated the choice because here it is not about an arithmetic of deaths but also torture.
This is a totally vastly different scenario to one where you're driving in a car and for whatever reason, lets say just a horrible accident, there are 4 people in the road and you can make a choice to save 0 lives or 2 lives. The scenario you have brought up just now cannot be compared and the car one is much more straightforward.
My point is that just because its we can mitigate much if not all of the blame for killing someone in self-defence doesn't mean that killing anyone still isn't bad. To my mind, the idea of this forfeit you talk about implies that this badness is completely removed. Thats why I dont like this language. It works better in a kind of legal context, not a moral one imo.