Logicians’ warm-up
No example of the liar’s paradox but a good warm-up is
The Puzzle of the Masked Men (found at Fallacy Files)
During a bank robbery, one of the masked robbers shot a bank guard. The police caught all four robbers and interrogated them in an attempt to determine which was the shooter. Each was questioned while attached to a lie detector machine and … (read on at Fallacy Files)