The balancing of normative arguments aims at determining a priority between the conflicting arguments according to their weight in the particular case. The weight of normative arguments in the particular case depends, on the one hand, on the abstract relative weight of the arguments and, on the other, on the degree of fulfilment or non-fulfilment (interference) of the competing demands that follows from the suggested priority relation. This structure is defined by the model of balancing as optimisation. However, a contested issue is which role epistemic assessments have to play in this balancing.