In the first week of October 2022, TIAS and Netherlands Environmental Assessment Agency PBL hosted a hybrid seminar for practitioners of Integrated Environment Assessment (IEA). The focus was on emerging approaches in IEA work that seem productive in the post-truth society. Keynotes addressed the changing context of knowledge contestation in Europe and Brazil. In particular, quantitative models and their role in IEA were discussed – grand challenges, regulatory demands, mobilizing the arts, etcetera. The seminar was held under Chatham House rules. Conclusions by the organizers focus on the evolving role of interface organisations, such as PBL, and identify a handful of interesting lines of work. The seminar report is now available for downloading from this site.