The Paradox of Perfect Prediction
In this mind-bending game, you choose between taking one box or two. A nearly perfect predictor has already filled the boxes based on what they know you will decide, creating a trap where the rational choice is debated by experts.
Imagine two boxes: one holds a thousand dollars, and the other holds either nothing or a million dollars. If you take both boxes, you get the thousand, but the predictor has likely left the million empty. If you take only the second box, you walk away a millionaire. This puzzle forces you to decide if your choice influences the past or if the money is already fixed. It remains a famous challenge in decision theory that stumps even the most brilliant logicians.
Source: Newcomb's problem