Poll Results

Total votes: 825

Neither true nor false: 308 (37.3%)
A goat behind the other door: 141 (17.1%)
The pirate is his mother: 115 (13.9%)
True only if the prisoner doesn't expect it the day before: 79 (9.6%)
True and False: 51 (6.2%)
False: 41 (5.0%)
True or false, but not both: 35 (4.2%)
True if the lightswitch has been flipped, false otherwise: 26 (3.2%)
True: 23 (2.8%)
True on the 31st night: 6 (0.7%)