Learning and its Rationality in a Context of Fundamental Uncertainty

Suppose we define a “context of fundamental uncertainty” as a situation in space and time in which a relevant number of individual actors loose confidence in their ability to interpret the signs of the outer world and to anticipate future events: What can be said of learning processes taking place in such a context? We would like to explore the idea that these processes lend themselves to an approach which puts them in an evolutionary perspective, which models evolution as a communicative process, and which attributes rationality not to individual action but to special traits of communicative structures.