unexpected hanging paradox

The unexpected hanging paradox is a logic puzzle that questions the predictability of a future event when the prediction itself influences the outcome. A prisoner is told he will be hanged on a weekday of the following week, but he won't know which day until the morning of the hanging. The prisoner reasons that he cannot be hanged on the last day, Saturday, because if he's still alive on Friday, he'd know Saturday is the only option, thus knowing in advance. He extends this logic to every preceding day, concluding the hanging is impossible. However, the paradox lies in the fact that the judge's decree can still be carried out. The core of the paradox is that a statement about a future event can be known to be true by one person but not by another until after the event occurs.12