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.
@Mr_NutterButter
Come on, it's Blackrock. They have only one solution for everything.
Tell them, that your rat had informed you about a guy who was planning to escape. Do not mention who the rat is, since you don't have any, and execute the guy who "was planning to escape"
Now, they will no longer be able to plan an escape, since they will be too buissy finding the rat.
@Mr_NutterButter
Or..... you tell them, that the last one standing is free to go.
And off the lucky bastard. But I don't think, that 0% survival rate was the goal.
@LukeAlmighty definitely not the goal, but it's a fun way to think about it...