Answer:
The idea of the prisoner's dilemma is the aim for two persons to strike a balance between cooperativeness and competition.
Explanation:
Once the teacher finds out that there has been two persons copying in her class test she can give them the following option to confess:
This will be sure to get a confession of some sort. But I believe if you suspect copying this is a very high energy way to solve that problem for the professor. Simply give both of them zero and write the reason. The will react according to their accountability.