ancient vocal tract simulation work following work laitman lieberman et al reconstruction vocal tracts hominids early humans must like believe mechanical simulators output made would interested details whether anyone tried computer simulation phonetic range vocal tracts differ modern humans e g higher larynx related question saw letter scientific american year ago saying origins language work based fallacy mammals humans breathe swallow time reading seem underly major work like confirmation wrong someone point debate going debate point view ignorance anatomy physiology biological anthropology would seem question could fairly easily resolved empirically patrick mcconvell anthropology northrn territory university po box 40146 nt 0811 australia