MainHonesty and truthfulness underpin accountability, transparency and informed decision-making in democratic societies. A collective commitment to truth cultivates discourse grounded in empirical evidence and fosters social cohesion through a shared understanding of reality1. In many democracies, there is currently much concern about ‘truth decay’2: the blurring of the boundary between fact and fiction3, not only fuelling polarization but also undermining public trust in institutions3,4.We adop...