Originally Posted by omk3
But even so, all this takes into account that the prisoners only just realized that there are two colours only, and both are represented. But they knew that from the start, didn't they? And if so, shouldn't they have left sooner? What changed?
OMK has a point - and not on top of his head either
In the set up you said that the prisoners were all told they were marked with either Green or Blue. So actually, as soon as there were at least 2 prisoners with each color, they should have been able to figure it out in X number of days, where X is the number of people marked with the least represented color.