A mentalist spreads a deck of cards face down in a wide arc across the table. They gesture casually toward the spread and say, “I want you to reach out and touch any card. Completely your choice. Take your time.” You scan the options. There are fifty-two cards, fifty-two possibilities. You feel the weight of the decision. Your hand hovers over different positions as you consider which one to choose. Finally, you extend your finger and touch one card. It feels random. It feels like genuine choice. The mentalist has given you no instruction beyond “touch any card.” Except you...