C knows the answer by deducing D is not yelling out the answer. i7 ~: U7 k7 ^4 \; ?0 |
That means D is not sure the answer by seeing one white and one black. , {1 {$ U3 L. B9 }9 C: CC 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.