In some decision problems, even after reflection, relevant probabilities and utilities are indeterminate. Then a rational decision maximizes utility with respect to a quantization of beliefs and desires. It is robust with respect to a sensitivity analysis. Rationality does not require meeting the maximin rule, which in its standard form expresses excessive aversion to risk. Multiple decisions must form a coherent set, however.
Keywords: coherence among decisions, indeterminacy, the maximin rule, probability, quantization, risk, sensitivity analysis,