According to inmate Savo Brković’s reminiscences, a group of particularly active Communist Party members frequently entered discussions following guest lecturers’ talks, and openly countered the lecturers’ or the teachers’ theses, defending a Marxist point of view or emphasizing fallacies and loopholes in the speakers’ theoretical frameworks.

Brković remembered a particularly vivid incident, when inmate Mihajlo Radić — ‘theoretically fairly strong, who could challenge any of those lecturers of ours’ — argued with Najdanović, one of the speakers and Ljotić’s close associate, and presented arguments so strongly and skilfully that the lecturer was clearly unable to respond and ended the discussion.³⁸

(Source.)