Education: Multiple Confusion

In the old schoolboy game of guessing which fist has a marble in it, the story goes, one lad almost always won. He knew that a boy with a little cunning would shift the marble after its position had been guessed, while a smarter boy would expect this move to be anticipated, and keep the marble in the same hand. A still cleverer player would know that even this subtlety would be seen through, so he would shift his marble. It is the contention of one aroused educator that the best U.S. students are forced to play just such a guessing...

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