A prisoner riddle
Quite some time ago, I came across a riddle, and I’d like to share a variant of it with you: 100 prisoners are incarcerated in a very peculiar jail. The jail has a single room with a light controlled by a switch that is initially off. The prisoners are each told that they will be taken one at a time into this room, and will be allowed to flip the switch if they so desire. They will then be...