Case 322
The Disabled Camera
A security camera was deliberately switched off.
Rule: exactly one suspect is guilty. The guilty suspect lies. Every innocent suspect tells the truth.
Logan
“Dakota is guilty.”
Riley
“Logan is innocent.”
Casey
“Riley and Kendall are both innocent.”
Kendall
“Either Logan or Dakota is guilty.”
Dakota
“Either Logan or Riley is guilty.”
Who is guilty?
Solution: Dakota
If Dakota is guilty, Dakota's statement is false and every other statement is true. Testing the other suspects creates at least one contradiction.