Does good governance require citizens to be knowledgeable of basic facts and best policy ideas? Some scholars suggest that it does, and propose disenfranchising the most ‘ignorant’ voters. In contrast, we argue, political systems are complex systems inevitably exhibiting incomplete, imperfect and asymmetric information that is dynamically generated in society from actors with diverse life experiences, antagonistic interests and often profoundly dissonant views and values, generating radical uncertainty among political elites over the consequences of their decisions. Radical uncertainty, radical dissonance and power asymmetry are inescapable properties of politics. Good performance significantly depends on how political elites navigate through radical uncertainty to handle radical dissonance. Democracy, by offering citizens equal rights to participate in politics and talk freely, both enables and compels political actors to track social feedback regarding the effects of their decisions on a diverse public, and consider it in ways that mitigate these three problems.