Case 280
The Broken Seal
A tamper seal on a storage crate was cut overnight.
Rule: exactly one suspect is guilty. The guilty suspect lies. Every innocent suspect tells the truth.
Kai
“Cameron is innocent.”
Frankie
“Either Peyton or Lane is guilty.”
Peyton
“Lane is guilty.”
Lane
“Kai is innocent.”
Cameron
“Frankie and Lane are both innocent.”
Who is guilty?
Solution: Peyton
If Peyton is guilty, Peyton's statement is false and every other statement is true. Testing the other suspects creates at least one contradiction.