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Therefore, we attempt-to treat the same problem with several alternative models each with different simplifications but with a common biological assumption. Then, if these models, despite their different assumptions, lead to similar results we have what we can call a robust theorem which is relatively free of the details of the model. Hence our truth is the intersection of independent lies.
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Richard Levins. 1966. The strategy of model building in population biology. 
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https://uberty.org/wp-content/uploads/2015/07/Levins-1966-Model_Building.pdf
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