A number of playful discussion formats are being developed and used in science centres. In addition to aiding informal learning about science, these discussions also support participants in finding and expressing their own views based on facts and civil debate. This structure contributes to freedom of thought and opinion, but how effective are these formats in empowering citizens? This session will present case studies of new formats, introduce a manifesto of discussion tools and open the floor to discuss which elements constitute true and open dialogue.