Hypothetical Pattern Idealization and Explanatory Models

Highly idealized models, such as the Hawk-Dove game, are pervasive in biological theorizing. We argue that the process and motivation that leads to the introduction of various idealizations into these models is not adequately captured by Michael Weisberg’s taxonomy of three kinds of idealization. Consequently, a fourth kind of idealization is required, which we callhypothetical pattern idealization. This kind of idealization is used to construct models that aim to be explanatory but do not aim to be explanations.