Situation: Two men are kidnapped by a serial killer. The serial killer poisons one man with a 100% lethal poison that renders the man unconscious – this man will die within 24 hours, no antidote, no chance, he’s not waking up ever again, bar none. The serial killer then hands the other man a knife and seals both men in an airtight room with enough air to last two men for 12 hours or one man for 24 hours and says, “I’ll open the room in 24 hours.” There are now two options:
- Both men suffocate to death in 12 hours.
- The man with the knife stabs the unconscious, already-dying man to death so that he himself will survive the 24 hours.
Is it morally acceptable for the man with the knife to stab the dying man to save his own life? (Remember, there’s only 24 hours of air for one man in the room – the decision has to be now.)
For me, it is important to ask some additional questions. “Is it morally acceptable for the man to stab the dying man” is not the only question- but rather, “Can we have the degree of certainty necessary to
know that our act of killing is only hastening a death that is otherwise inevitable.”
Think about it- in this situation, it is still absolutely not justifiable for the healthy man to kill the dying man, since there are so many unknowns.
Based on his behavior, we know that the serial killer is quite capable of acting immorally- therefore we cannot trust him not to lie. Therefore, we have no reliable information about the poison that the other man has been given, whether it is actually fatal, whether there is an antidote.
Furthermore, we don’t know for sure the capacity of the room and the amount of air. Even if the information came from some supposedly reliable source and not the serial killer, it is still possible that there is a miscalculation about the amount of air required, or about the amount of time that it will take the other man to die.
In addition- there is no evidence that killing the (possibly) poisoned man will actually save a life- as we have seen, the serial killer is not to be trusted and so we have no evidence that the door will actually open in 24 hours. More likely, based on an evaluation of the killer and how he is likely to behave, both men will die anyway.
I would argue that it is never possible for situations in life to be predictable to the degree that the OP is proposing- therefore it is always
possible that the healthy man might actually be killing someone who would not otherwise die.