Case 172
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.
Jordan
“Neither Marley nor Noah is guilty.”
Blake
“Either Jordan or Marley is guilty.”
Marley
“Either Blake or Noah is guilty.”
Drew
“Either Blake or Marley is guilty.”
Noah
“Neither Marley nor Drew is guilty.”
Who is guilty?
Solution: Blake
If Blake is guilty, Blake's statement is false and every other statement is true. Testing the other suspects creates at least one contradiction.