 Setting modelling practice aside, which (known or unknown) facts determine correctness, i.e., constitute the state? One can distinguish between logical, empirical and normative facts. When a group of logicians votes on whether an argument is valid, correctness depends on logical facts. When a panel of climate experts predicts the average global surface temperature in 2100, correctness also depends on empirical facts. When a parliament decides on whether to allocate more funding to the health system, correctness depends on normative facts, besides empirical (and logical) facts. In many social decisions, correctness depends both on unknown empirical facts and unknown normative facts, particularly for decisions on actions or on beliefs about what is valuable or ought to be done.