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Logic
Whose
Footprints?
One of the triplets left muddy footprints all over
the kitchen floor. Since all three wear the same
size shoes, their mom and dad can't tell which triplet
should clean up the floor. "I didn't do it," said
Annie. "Danny did it," said Fanny. "Fanny is lying,"
said Danny. Only one of the triplets is telling
the truth — the other two are lying.
Whose footprints are on the kitchen floor?
Annie left the footprints. Remember, only one triplet
can be telling the truth. If Danny did it, then
both Fanny and Annie are telling the truth. If Fanny
did it, then Danny is telling the truth when he
says that Fanny is lying. With Annie as the culprit,
Annie is lying by claiming she is innocent, Fanny
is lying by accusing Danny, and Danny is the one
who is telling the truth.
