"There is nothing more basic to thought and language than our sense of similarity; our sorting of things into kinds." Kant (1724-1804). The human brain is described as "the system of systems" (Greenfield 1997). A subset of this system, and a large source of data collection, recognition and representation, is "the human vision system." a novel approach to the feasibility of a CBR method to establish a generalised approach for defining similarity metrics between 3D shapes in Case-Based Reasoning.