Discusses the conditions for validating customary phylogenetic procedures. Concludes that the requisites of homogeneity and completeness for proved short lineages seem satisfied by the Hennigian but not the Haeckelian procedure. The epistemological antinomy of the two procedures is emphasized for the first time. (Author/RH)

Comments on an earlier paper by Lerner and von Eye on sociobiology and human development; general theory in science, especially evolutionary theory; adaptation and behavior plasticity; and modern behavior genetics. Examines assertion that "heritability says nothing about the extent to which a trait is commonly inherited." Discusses…