Imagine a group of students were hanging out after class and one person jokingly suggested they should cheat on the exam. The other students agree and give different reasons why they should cheat and how easy it would be. After a few minutes of discussion, all the students feel committed to cheating, even though the each know it is wrong. Further, no one person feels comfortable bringing up reasons against cheating because the group seems in favor of cheating. This dynamic is an example of: