This chapter analyzes the French Citizens Convention for Climate (CCC), a democratic experiment in public policy cocreation, responding to climate change and the democratic crisis. The CCC, involving 150 citizens, aimed to propose measures for reducing greenhouse gas emissions. Despite producing 149 proposals, the government's limited implementation led to widespread dissatisfaction, which highlights the complexities of policy cocreation. Through textual statistics analysis, the study reveals the "wicked" nature of cocreation, intensified by diverse values and interests among participants. It underscores the critical need for the government's political readiness and absorptive capacity in cocreation processes. While citizens showed commitment and capability, political-administrative elites displayed resistance, indicating a policy capacity gap. This resistance not only undermined the CCC's efforts but also exacerbated public distrust in political processes. The CCC's experience suggests that future cocreation initiatives in public policy must better integrate with political decision-making. The balance between standardization and contextual adaptation is key to effectively addressing complex societal issues. This chapter advocates for close monitoring of cocreation applications in public policy to assess their effectiveness in resolving societal challenges.