C knows the answer by deducing D is not yelling out the answer.公仔箱論壇+ r" `' n* z& E w/ K2 S. j
That means D is not sure the answer by seeing one white and one black.& }& h+ z4 t. _
C saw B is wearing the white, hence he is wearing the black
C, because he saw B's hat is white and he knows D can see the color of B's and his hat. If B and his hat has the same color, D would speak out. But D kept silent, so C knows that his hat's color must be different.
發表於 2013-2-10 08:55 PM
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好難哦~~
