Knowledge Science, Engineering and Management

Argumentation can be modelled at an abstract level using an argument graph (i.e. a directed graph where each node denotes an argument and each arc denotes an attack by one argument on another). Since argumentation involves uncertainty, it is potentially valuable to consider how this can be quantified in argument graphs. Two key approaches to capturing uncertainty in argumentation are the constellations approach and the epistemic approach. The former can be used to represent uncertainty over the topology of the argument graph, and the latter can be used to represent belief in arguments. Theoretical foundations, and studies with participants, are being developed for both approaches.