Encephalization is the perceived process of brain size increase during evolution. However, this process is oversimplified. Previous results from the analysis of the encephalization residual show that significant ER exists only for all members of the genus Homo, except for Homo naledi, but also for Australopithecus sediba and Australopithecus africanus. Analyzing the same data set, plotting mean endocranial volume as a function of mean body weight and applying Ward hierarchical clustering shows that six species of Homo segregate from two species of Homo, three species of Australopithecus, two species of Paranthropus, and Ardipithecus ramidus. These two species of Homo include Homo naledi and Homo habilis. This serves as further evidence supporting the idea that H. naledi should be classified as an ape and is non-human.