Escape from Killing Problem Solution
A man aproaches you in a dark alley. He says, 'If you tell a lie, I will kill you with a knife. If you tell the truth, I will kill you with a gun.'
What do you say to stay alive?
Recognize that only declarative statements have a truth value.
Don't make a declarative statement; that way it won't be the truth or a lie.
Here are three possibilities:
 Remain silent. - or if you must say something, ask a question
 Why do you want to kill me? - or exclaim something:
 No! Please do not kill me!