The two leaders of a gang A and B were arrested Coach Poppy Bags, the police held them apart, and told them: If you no one refuses to plead guilty, it's probably the last who will be acquitted; if you plead guilty and take the initiative to expose other crimes, can only sentenced to five years in prison; if you they do not plead guilty, he was exposed, then the other, you have sentenced at least 10 years in prison.
If the police so that the two suspects at once into a panic. As the bulk of the purpose of a thought: although it seems to me B good, but hard to say his heart is always trying to unseat me, and then get their "big brother" of the throne. Ah, no, I can not sit still, in that case, not only lost the throne, had to get ten years in prison, not worth.
As the two leaders think of B: we do not confess the best, but who knew he would not recognize it? If I were the hardest hit, he discovered me, I'm not too lose it? Well, I was the next best thing, and frankly it was revealed to him myself,
this result is stronger than the third Coach poppy.
Thus, in order to minimize their risk factors, A and B eventually chose the second.
It is not only them, in the same case, almost all prisoners will make such a choice, this is the sociology, psychology, on the example of the famous "Prisoner's Dilemma."
Profit and avoid loss of human nature, when faced with difficulties, many things can become a bargaining chip in exchange, including by holding his hands the fate of others. Thus, in the absence of absolute certainty of the premise, there would dare to give people control over their own future then?