In the previous chapter we looked at the historical roots of scientific models. We will now turn to their contemporary use and view them from a philosophy of science perspective. As a starting point for this discussion we will specify what we actually mean by models, and discuss the different classes of models that exist. In order to broaden the concept and connect it to other concepts within science, we will relate modelling to phenomena and theories, and also analyse the relation between simulations of models and experiments. These notions will all be tied together, and made concrete in a worked example, where we show how a model typically is constructed. Lastly, we will try to draw conclusions about desirable properties of models, and discuss the dangers of modelling.
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