Researchers edward jones and victor harris (1967) had duke university students read debaters' speeches either supporting or attacking cuban leader fidel castro. when the students were later told that each debater's position had been assigned, they

I believe the answer is: concluded that to some extent the speech reflected the speaker's true beliefs.

During debate like this, it is very common that a certain individual would be assigned to defend the view/belief that does not aligned with their own. Since their unconscious reject that idea, it is very common for them to make incongruency in their speech when defending the view/belief.