Case 104
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
“Cameron is innocent.”
Harper
“Neither Cameron nor Frankie is guilty.”
Cameron
“Blake is guilty.”
Frankie
“Either Logan or Blake is guilty.”
Blake
“Either Cameron or Frankie 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.