The authors' model reduces the literature on conceptual representation to a
single node: "encyclopedic knowledge." The structure of conceptual knowled
ge is riot so trivial. By ignoring the phenomena central to reasoning about
living things, the authors base their dismissal of semantic systems oil in
adequate descriptive ground, A better descriptive account is available in t
he conceptual development literature. Neuropsychologists could import the i
nsights and tasks front cognitive development to improve their studies.