This is apparently an interview question from Black Rock.
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Murders in a field.
You are guarding 100 murders in a field and you have a gun with a single bullet. If only one of the murderers has a non-zero probability of surviving, he will attempt to escape. If a murderer is certain of death, he will not attempt escape.
How do you stop them from escaping.
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This question is so interesting so I thought I would give it a go of how I would answer.
I would announce to the prisoners.
That I have a kill switch, if I die the surrounding area is set to explode killing everyone. I walk around with the gun pointed to my head and a rubber band on the trigger finger, meaning if I get incapacitated the gun automatically fires.
I can't tell this solution is stupid, ingenious or completely fucking psychopathic, either way the prisoners aren't leaving.
@Eleutheria2 that's actually a pretty good one but I would like to counter with the fact that all of them are murderers meaning that one of them would be likely to not value his life no matter what and simply let you kill him to escape because presumably these people are narcissistic and extremely likely to be sociopathic meaning they only value their own life and nothing else but that.