A computational model of a mental model used to reason about climate change

Abstract The public discourse on climate change which occurs in the media, on the internet, in casual conversations and in the political debate, inevitably involves a considerable simplification of the functioning of the ‘real’ earth system. Among other reasons, it is so because cognitive limitations prevent humans to mentally evaluate the long term dynamics of many interacting variables. Nevertheless, this simplified representation can dramatically affect the future the real system because of its implications for devising, choosing and supporting specific mitigation policies. The numerical modelling of this mental representation (as opposed to the numerical modelling of the ‘real’ system) provides for explicitly articulating the assumptions underlying the beliefs of how the world functions and the values for the choices on how to act. It also allows to check the consistency of the widely different forecasts such beliefs and values generate.

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