As a professor I taught a class on the NAFTA. I would have debates as part of the course and force the students to take opposing viewpoints and defend them to the class. Many objected to the teams I put them on because they disagreed with that position but in forcing them to investigate the other side they did find rational reasons for the opposing viewpoint. The side that won got a + bump to their grade so if they earned an A for their team’s work, if the class voted for their position they received an A+. Thus their work was graded on the basis of their investigation but the reward came in being convincing and persuasive. This was a business class and I always told them that such behavior would be good practice for future business meetings when they had to persuade people to support their proposals.