For instance, you may say you won't push because the man might fight back, and you'd both fall but not till after the trolley had passed so everyone dies. So imagine the fat man in a wheelchair, so he can be lightly rolled off the bridge. And if you're too socially constrained to consider hurting a handicapped person, maybe the five people tied to the tracks are also in wheelchairs. If you think that being pushed off a bridge is more terrifying than being hit by a train, suppose the fat man is thoroughly anesthetized.
Your modification of the problem to make "push the guy" the obvious answer still doesn't answer my objections to doing so, which are quite robust against modifications of the scenario that preserve "the sense" of the problem:
...By intervening to push someone onto the track, you suddenly and unpredictably shift around the causal structure associated with danger in the world, on top of saving a few lives. Now, people have to worry about more heros drafting sacrificial lambs "like that one guy did a few months ago" and have to go to greater lengths to get the same level of risk. ...
... I don't pretend that that is what most people are thin
Especially if you call yourself a utilitarian, as many folks here do, how can you not push?
Some are utilitarian. Most are consequentialist with some degree of altruistic preference.
Have your answer?
Flip. Push. (All else being unrealistically equal.)
Good. Now comes the third, final, and hardest question; especially for anybody who said they'd push the fat man. There is still no switch or alternate track. The trolley is still coming down the tracks, and there are still five people tied to it. You are still standing on a bridge over the tracks. But this time you're alone and the only way to stop the train is by jumping in front of it yourself. Do you jump?
No. I don't want to kill myself. I would rather the victims of the psychopath lived than died, all else being equal. But I care about my own life more than 5 unknown strangers. The revealed preferences of the overwhelming majority of other humans is similar. The only way this question is 'hard' is that it could take some effort to come up with answers that sound virtuous.
If you said yes, you would push the fat man; but you won't jump. Why?
I'm not a utilitarian. I care more about my life than about the overwhelming maj...
You're being either really blind or deliberately obtuse. Caring more about your life than the life of five strangers doesn't mean you care infinitely more about yourself than you do about them. Maybe you'll pull a muscle flipping the switch? it's entirely legitimate to say that you'll take some costs upon yourself to do a big favor for 5 strangers without being willing to take the ultimate cost upon yourself.
The best answer I know is Rawlsianism.
No! That is not Rawlsianism. Rawls was writing about how to establish principles of justice to regulate the major institutions of society; he was not establishing a decision procedure. I think you mean UDT.
That is not Rawlsianism. Rawls was writing about how to establish principles of justice to regulate the major institutions of society; he was not establishing a decision procedure.
Yes. "Rawlsianism" is mostly commonly used to refer to Rawls' theory of political justice specifically (e.g. Kordana & Tabachnick 2006).
I will briefly remark, however, that Rawls' original work on the justification of ethical principles was in the context of decision procedures. His first paper on the topic, "Outline of a Decision Procedure for Ethics" (1951) is pretty explicit about that. Also, other philosophers have gone on to borrow the Rawlsian approach to political justice for the purpose of justifying certain decision procedures in ethics or practical decision-making, e.g. Daniels (1979).
Try not to Kobayashi Maru this question, at least not yet. I know you can criticize the scenario and find it unrealistic. For instance, you may say you won't push because the man might fight back, and you'd both fall but not till after the trolley had passed so everyone dies. So imagine the fat man in a wheelchair, so he can be lightly rolled off the bridge. And if you're too socially constrained to consider hurting a handicapped person, maybe the five people tied to the tracks are also in wheelchairs. If you think that being pushed off a bridge is more terrifying than being hit by a train, suppose the fat man is thoroughly anesthetized. Yes, this is an unrealistic thought experiment; but please play along for now.
Just so you know, the common term for this around here is don't fight the hypothetical.
The reason people object to the fat man is that we have very strong intuitions about how physical systems work, and that includes "things rolling on tracks stay on tracks, and keep rolling regardless of how fat a guy is put in front of them". It is basically a bad philosophy problem because the way the problem reads to most people is "let 5 people die, or up the killcount to 6" which is, you know, not a difficult choice. And no matter how much you state that it will work, this intuition sticks with people. The lever version does not have the same conflict, because the problem does not have to fight against that basic reaction.
If you offer me a $1:$1 bet that a six-sided die doesn't land on a six, I take it. But now you tell me that the die landed on a six, and want to make the same bet about its outcome. Of course I don't give the same answer!
My life is worth more to me than other lives; I couldn't say by how much exactly, so I'm not prepared to answer any of the dice-rolling questions. However, I am aware that to person C, person A and person B have equal-worth lives, unless one of them is C's spouse or child, and this provides an opportunity to make deals that benefit both me and other people who value their own lives more than mine.
So, for example, I would endorse the policy that bridges be manned in pairs, each of the two people being ready to push the other off. This is, effectively, a commitment to following the unselfish strategy, but one that applies to everyone. TDT offers a solution that doesn't require commitments; but there, we need the vague assumption that I'm implementing the same algorithm as everyone else in the problem, and I'm not too sure that this applies.
Oh and also I think I would jump for a hypothetical wife and daughter (or even a hypothetical son, imagine that), but at that point the question becomes less interesting.
Now imagine Snidely says instead he'll roll a die. If it comes up 1-5, he puts six people including you on the track. If it comes up 6, he lets you go and puts the other five people on the track. However if you agree to be tied to the track without a roll, without even a chance of escape, he'll let the other five people go. What now? Suppose he rolls two dice and they both have to come up 6 for you to go free; but he'll still let everyone else go if you agree. Will you save the other five people at the cost of a 1/36 chance of saving your own life? How about three dice? four? How many dice must Snidely roll before you think the chance of saving your own life is outweighed by the certainty of saving five others?
Is this going to be a "Boo Cryonics! Buy mosquito nets for Africans." set up?
The trouble with "push the fat man" answers is that in the long run they don't result in a world with more people saved from runaway trains, just a world in which fat men no longer feel safe walking near train tracks. The same applies to "I am morally required to jump" answers. Replace "in the long run" with "in the short run" if you are short-sighted enough to pre-announce your answer, as we're doing in this thread; the average fat man and/or morally shameable man is probably capable of figuring out the implications.
Your potential victims may not be Omega, but they may still be capable of figuring out when you're planning to two-box.
This isn't a hard problem at all. I would push someone else onto the tracks (in the idealized, hypothetical, trolley problem) but I wouldn't jump. The reason is that pushing the guy onto the tracks isn't about doing the Right Thing™; it's about getting what I want. I want as many people as possible to live, but I care about my own life a lot more than the lives of small numbers of other people. It shouldn't be too hard to predict my answers to each of your variants based on this.
I would take no action in any real-life trolley problem unless there were a lo...
My answer to all three forms of the trolley problem is roughly the same... I almost undoubtedly wouldn't flip the switch, push the person, or sacrifice myself, but I endorse doing all three.
In the latter case, I would feel guilty about it afterwards (assuming the idealized version of the scenario where it's clear that I could have saved them by killing myself). In the former two cases, I would feel conflicting emotions and I'm not sure how I would resolve them.
Similar issues come up all the time with respect to, e.g., donating all of my assets to some life-saving charity.
I also often defect in Prisoner's Dilemmas, as long as I'm confessing my sins here.
Though I am far too selfish to sacrifice myself, I just want to point out that anyone who would sacrifice themselves in this way (and not just because they are suicidal) better also living an extremely altruistic lifestyle right now.
As in, you devoted to making money largely for the purpose of donation, or you run a very successful charity. If you have unique and specialized brilliance, you might get off instead spending time solving an important problem only you can solve - but the circumstances better be extraordinary, and you are still donating almost ...
Great post. Here's my unvarnished answer: I wouldn't jump, and the reasons why involve my knowledge that I have a 7-year old daughter and the (Motivated Reasoning and egotism alert!!) idea that I have the potential to improve the lives of many people.
Now of course, it's EXTREMELY likely that one or more of the other people in this scenario is a parent, and for all I know one of them will invent a cure for cancer in the future. In point of fact, if I were to HONESTLY evaluate the possibility that one of the other players has a potential to improve the plan...
What's the difference between the cases? There is quite a literature on this, including the theory that pushing the fat man triggers an emotional revulsion which flipping a switch does not. And answers to the effect that it is immoral to push the fat man are just attempts to rationalise this revulsion. That's a cynical, but possible, explanation.
Another theory is based on intentions: by flipping the switch, you are not intending to kill the one person on the alternate track (you'd be very glad if they somehow escaped in time), whereas in pushing the fat ...
Myself, I am not a utilitarian, but a deontologist. I would flip the switch, because I have been given the choice to choose between two different losses, inescapably, and I would try to minimize this loss. As for pushing someone else in front of the trolley, I could not abide someone doing that to me or a loved one, throwing us from relative safety into absolute disaster. So I would not do it to another. It is not my sacrifice to make.
As for throwing myself in front of the trolley...
I would want to. In the calm state I am in right now, I would do it. In t...
Suppose in case 3 someone else, not you, is tied to the track but can reach the switch. What now?
I'm confused. If I'm not the one flipping the switch, what's the question you're asking?
Oh. This seems unnecessarily treading over previously covered ground. My short answer is "no".
My long answer would probably be some sort of formalization of "no, but I understand why they'd do it". I'd be happy with the cognitive algorithm that would make the other person flip the switch. But my feeling is that when you do the calculations, and the calculations say I should die, then demanding I should die is one thing... demanding I be happy about it is asking a bit much.
A variant:
Your country is being invaded by evil barbarians. They intend to steal anything portable of value that they can, which includes people that have value as slaves.
Should you volunteer to join your country's army? Would you?
Should your country institute conscription, if it will increase the chances of successfully fighting off the invaders?
If you answered "yes" to the previous question, would you vote to institute conscription, if it meant that you personally will be one of those people conscripted?
Should you volunteer to join your country's army?
The unpacking of the word 'should' here is more complicated than the remainder of the question by far.
Would you?
No. I don't unilaterally cooperate on commons problems. I also note that some people choosing to cooperate unilaterally can reduce the incentive for others to find away to enforce a more effective and complete solution. For example, an army of 1,000,000 naive altruists may be expected to beat the barbarians but with 900,000 casualties. In that case the others have an incentive to free-load. However an army of 10,000,000 conditional cooperators who constructed an enforcement mechanism may be expected to crush the enemy with overwhelming force, losing a mere 50,000 casualties. In this case volunteering is an evil act, not a good one.
Should your country institute conscription, if it will increase the chances of successfully fighting off the invaders?
If the choice is between using a volunteer army of the most altruistic and gullible and a conscripted army then yes, I prefer the conscription option particularly if it increases the chances of success. But it isn't my preferred mechanism.
The best way to get people to ...
You pick your answer in ignorance of who you'll be in the problem. You don't know whether you're the pusher, the pushed, or one of the people tied to the tracks. In this case, the answer is easy: push! There's a 6/7 chance you'll survive so the selfish and utilitarian answers converge.
You mean, the selfish answer becomes the utilitarian one. In general I find arguments which only work when you consciously refuse to take into account some of the information available to you (like whether you are the pusher) quite suspect. It seems anti-Bayesian.
Just to clarify, the trolley problem is related to the repugnant conclusion, where utilitarianism+additivity+transitivity+dense set of outcomes lead to counterintuitive decisions. You can live with these decisions if you are a perfect utilitarian, or you have to break or weaken some of the assumptions, if you are not.
I am starting to think the rails for that trolley were laid around a mulberry bush.
The best answer I know...
What is "best"? If you want to compare (or at least rank) the options available to you, you need a metric. "Best" is vague enough to be useless. What yardstick do you want to use?
In a vacuum where I knew nothing in advance about myself or those on the track, I would morally advocate my jumping. But I think it's rather plausible I'll go on to save far more than just five more lives in my lifetime than the average person would, should I stay alive. So by not jumping, I actually save more people. (Though this might just be a convenient rationalization.)
I would throw the switch to divert the train from the track with five people to the track with just the one, then immediately lay down on the tracks next to the person I’m condemning to die and beg his forgiveness while I wait for the train to kill us both. I don’t have to live more than a moment with the distress murdering that man would cause me, and I might be able to provide him a moment of comfort knowing that he’s not dying alone. Save the five, ease the suffering of the one to whatever very minimal degree you are capable, and die knowing you deserve to be on the tracks with him if you are willing to condemn him.
I feel like I shouldn't sacrifice myself because I can save more than five lives. Then again, me not being able to do so would be part of the "all else being equal" thing that's implicitly assumed. If I take into account that I can save more lives, I also have to take into account that I could be arrested for pushing the fat man off the track.
Updated case 2: Ask the person tied to the track what they would do if our situations were reversed. Do that. My reasoning is that the people on the track are much more affected by the decision than the people off of the track, and therefore my utility is probably maximized by letting them maximize their own utility. If I can hear the other 5 people, I'll let them take a vote and respect it.
Updated cases 3 and 4 are identical, it's just that humans think about actions kind of strangely. In both cases I would save myself unless I was feeling particular...
By now the Trolley Problem is well known amongst moral philosophers and LessWrong readers. In brief, there's a trolley hurtling down the tracks. The dastardly villain Snidely Whiplash has tied five people to the tracks. You have only seconds to act. You can save the five people by throwing a switch and transferring the trolley to another track. However the evil villain has tied a sixth person to the alternate track. Should you throw the switch?
When first presented with this problem, almost everyone answers yes. Sacrifice the one to save five. It's not a very hard choice.
Now comes the hard question. There is no switch or alternate track. The trolley is still coming down the tracks, and there are still five people tied to it. You are instead standing on a bridge over the tracks. Next to you is a fat man. If you push the man onto the tracks, the trolley car will hit him and derail, saving the five people; but the fat man will die. Do you push him?
This is a really hard problem. Most people say no, they don't push. But really what is the difference here? In both scenarios you are choosing to take one life in order to save five. It's a net gain of four lives. Especially if you call yourself a utilitarian, as many folks here do, how can you not push? If you do push, how will you feel about that choice afterwards?
Try not to Kobayashi Maru this question, at least not yet. I know you can criticize the scenario and find it unrealistic. For instance, you may say you won't push because the man might fight back, and you'd both fall but not till after the trolley had passed so everyone dies. So imagine the fat man in a wheelchair, so he can be lightly rolled off the bridge. And if you're too socially constrained to consider hurting a handicapped person, maybe the five people tied to the tracks are also in wheelchairs. If you think that being pushed off a bridge is more terrifying than being hit by a train, suppose the fat man is thoroughly anesthetized. Yes, this is an unrealistic thought experiment; but please play along for now.
Have your answer? Good. Now comes the third, final, and hardest question; especially for anybody who said they'd push the fat man. There is still no switch or alternate track. The trolley is still coming down the tracks, and there are still five people tied to it. You are still standing on a bridge over the tracks. But this time you're alone and the only way to stop the train is by jumping in front of it yourself. Do you jump? If you said yes, you would push the fat man; but you won't jump. Why?
Do you have a moral obligation to jump in front of the train? If you have a moral obligation to push someone else, don't you have a moral obligation to sacrifice yourself as well? or if you won't sacrifice yourself, how can you justify sacrificing someone else? Is it morally more right to push someone else than jump yourself? I'd argue the opposite...
Realistically you may not be able to bring yourself to jump. It's not exactly a moral decision. You're just not that brave. You accept that it's right for you to jump, and accept that you're not that moral. Fine. Now imagine someone is standing next to you, a skinny athletic person who's too small to stop the train themselves but strong enough to push you over into the path of the trolley. Do you still think the correct answer to the trolley problem is to push?
If we take it seriously, this is a hard problem. The best answer I know is Rawlsianism. You pick your answer in ignorance of who you'll be in the problem. You don't know whether you're the pusher, the pushed, or one of the people tied to the tracks. In this case, the answer is easy: push! There's a 6/7 chance you'll survive so the selfish and utilitarian answers converge.
We can play other variants. For instance, suppose Snidely kidnaps you and says "Tomorrow I'm going to flip a coin. Heads I'll put you on the tracks with 4 other people (and put a different person on the bridge next to the pusher). Tails I'll put you on the bridge next to a pusher." Should the pusher push? Actually that's an easy one because you don't know where you'll end up so you might as well save the four extra people in both scenarios. Your expected value is the same and everyone else's is increased by pushing.
Now imagine Snidely says instead he'll roll a die. If it comes up 1-5, he puts six people including you on the track. If it comes up 6, he lets you go and puts the other five people on the track. However if you agree to be tied to the track without a roll, without even a chance of escape, he'll let the other five people go. What now? Suppose he rolls two dice and they both have to come up 6 for you to go free; but he'll still let everyone else go if you agree. Will you save the other five people at the cost of a 1/36 chance of saving your own life? How about three dice? four? How many dice must Snidely roll before you think the chance of saving your own life is outweighed by the certainty of saving five others?
Do you have your answers? Are you prepared to defend them? Good. Comment away, and you can even Kobayashi Maru the scenario or criticize the excessively contrived hypotheticals I've posed here. But be forewarned, in part 2 I'm going to show you an actual, non-hypothetical scenario where this problem becomes very real; indeed a situation I know many LessWrong readers are facing right now; and yes, it's a matter of life and death.
Update: It now occurs to me that the scenario can be tightened up considerably. Forget the bridge and the fat man. They're irrelevant details. Case 1 is as before. 5 people on one track, 1 on another. Pull the switch to save the 5 and kill the 1. Still not a hard problem.
Case 2: same as before, except this time you are standing next to the one person tied to the track who will be hit by the trolley if you throw the switch. And they are conscious, can talk to you, and see what you're doing. No one else will know what you did. Does this change your answer, and if so why?
Case 3: same as before, except this time you are the one person tied to the track who will be hit by the trolley if you throw the switch.
Folks here are being refreshingly honest. I don't think anyone has yet said they would throw the switch in case 3, and most of us (myself included) are simply admitting we're not that brave/altruistic/suicidal (assuming the five people on the other track are not our friends or family). So let's make it a little easier. Suppose in case 3 someone else, not you, is tied to the track but can reach the switch. What now?
Update 2: Case 4: As in case 3, you are tied to the track, five other unrelated people are tied to the opposite track, and you have access to a switch that will cause the trolley to change tracks. However now the trolley is initially aimed at you. The five people on the other track are safe unless you throw the switch. Is there a difference between throwing the switch in this case, and not throwing the switch in Case 3?
This case also raises the interesting question of legality. If there are any lawyers in the room, do you think a person who throws the switch in case 4--that is, saves themselves at the cost of five other lives--could be convicted of a crime? (Of course, the answer to this one may vary with jurisdiction.) Are there any actual precedents of cases like this?