Newcomb's paradox

Newcomb’s paradox is a thought experiment in decision theory where a player chooses between two options: take only one box (which may contain a large sum of money) or both boxes (one with a smaller amount, the other possibly with a large sum). A predictor has already forecasted the player’s choice: if they predicted the player would take only one box, the large sum is inside; if they predicted both, the large sum isn't. The paradox challenges whether to trust the predictor's accuracy and choose one box (relying on prediction) or both (maximizing immediate gain), raising questions about free will and rationality.