  The paper introduces an extension of the proposal according to which
conceptual representations in cognitive agents should be intended as
heterogeneous proxytypes. The main contribution of this paper is in that it
details how to reconcile, under a heterogeneous representational perspective,
different theories of typicality about conceptual representation and reasoning.
In particular, it provides a novel theoretical hypothesis - as well as a novel
categorization algorithm called DELTA - showing how to integrate the
representational and reasoning assumptions of the theory-theory of concepts
with the those ascribed to the prototype and exemplars-based theories.
