that a decision maker is unaware of an event if and only if her choices reveal that the event is null and the negation of … the event is null. Moreover, I characterize impersonal expected utility that is behaviorally indistinguishable from …

observe that a decision maker is unaware of an event if and only if her choices reveal that the event is null and the negation … of the event is null. Moreover, we characterize impersonal expected utility that is behaviorally indistinguishable from …