The
Grand Master takes a set of 8 stamps, 4 red and 4 green, known to the
logicians, and loosely affixes two to the forehead of each logician. so that
each logician can see all the other stamps except those 2 in the Grand Master's
pocket and the two on her own forehead.
He asks them in turn if they know the
colors of their own stamps:
A:
"No"
B: "No"
C: "No"
A: "No"
B: "Yes"
What
color stamps does B have?
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