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Mary, Bill, and John are standing side by side in a straight line. Mary is to the right of Bill; John is to the right of Mary. So is Bill to the left of John? No. Quite the contrary, Bill is to the right of John. How can that be?

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4 Answers 4

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Obviously:

John is facing the opposite direction to Bill and Mary.

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They could be standing in a straight line, on an appropriately-sized sphere.

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An additional answer:

Bill could be to the political right - i.e more conservative - and John to the political left (more liberal).

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Generalizing the obvious:

Either the first or the last in line, whoever that may be, is facing the opposite direction of the other two.

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