Case 257
The Empty Safe
A small office safe was found empty in the morning.
Rule: exactly one suspect is guilty. The guilty suspect lies. Every innocent suspect tells the truth.
Reese
“Either Blake or Rowan is guilty.”
Finley
“Neither Reese nor Rowan is guilty.”
Blake
“Either Finley or Cameron is guilty.”
Rowan
“Neither Finley nor Cameron is guilty.”
Cameron
“Neither Reese nor Finley 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.