The precautionary principle (PP) roughly recommends that we make careful decisions about how to act, especially where long-term human well-being is at stake, and where we face uncertainty that is more or less severe about the decision problem at hand. Not surprisingly, there has been much controversy about how this maxim for decision-making should be cashed out, and whether it provides any new, concrete guidance at all. Some argue that the PP is merely a ragbag of wisdom about appropriate values, beliefs, and decision rules governing the choice of how to act in any given circumstance. Moreover, when it comes to decision rules for negotiating uncertainty, there seems to be internal division as to whether the PP merely promotes the orthodox (‘expected value’)...

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