You sure you sure?” It turns out, we’re not sure we’re sure according to the classic 1973 study by Goethals and Reckman.In the study, researchers invited high schoolers to discuss their opinions on an issue—in this case, school segregation and whether bussing would help racial integration. Some time later, study participants returned for another discussion. This time, however, they were divided into pro and con groups. Inside each separated groups, Goethals and Reckman placed a “confederate,” a person armed with arguments for the opposing viewpoint. The goal was to reverse the groups’ outlook.In the end, both confederates successfully reversed the groups’ opinions.