Day 3: 5:00 P.M.-6:00 P.M. - S3-E5
Other mistake: At about 5:36 Jack and Ramon are playing Russian Roulette. Right before Ramon nods to Jack indicating the bullet will be fired, we see a shot of the gun from behind revealing the next chamber to be empty. The trigger would need to be pulled two more times in order to fire the bullet. (00:29:10)
Chosen answer: Nobody knew, not even the writers, until at least halfway through the season when they were writing the end. They wanted to keep all options open.