  At first sight, this question is only impressionistically related to the logical problem exercising the AI researchers. In contrast to the AI researcher's problem, the philosopher's question isn't expressed in the context of formal logic, and doesn't specifically concern the non-effects of actions. In a later essay, Dennett acknowledges the appropriation of the AI researchers' term (1987). Yet he goes on to reaffirm his conviction that, in the frame problem, AI has discovered “a new, deep epistemological problem—accessible in principle but unnoticed by generations of philosophers”.