Text: Moreover, if obnoxious behavior like aggression, rape, and philandering are biological, that would make them natural and hence good--or at least in the genes, where they cannot be changed by social reform.
Entailment: If obnoxious behavior is biological, that would make them natural behaviors, unchangeable by social reform.
Contradiction: If obnoxious behavior is biological, then it's possible for it to be changed by social reform.