 In contrast, awareness of unawareness would seem to be of great interest from the perspective of decision-making. If you suspect that there is some possible state, say, that you have not yet entertained, and some corresponding outcome, the content of which you are unaware, then you might want to at least come to some view about how likely you expect this state to be, and how good or bad you expect the corresponding outcome to be, before you make a decision.