Eureka ! Info - Gap is Worst - Case Analysis ( Maximin ) in Disguise !

Info-Gap is supposedly a new theory for decision making under severe uncertainty. Its claim to fame is that it is non-probabilistic in nature and thus offers an alternative to all current theories for decision making under uncertainty. In this short article I show that Info-Gap is neither new nor radically different from current decision theories. Specifically, I formally prove that Info-Gap’s decision theoretic model is a simple instance of Wald’s Maximin Principle, the most celebrated Principle in decision making under strict uncretainty.