Before revision: Inspired by the famous discussion by Gould and Lewontin, we thus qualify antagonism as a  "phenotypic spandrel": a phenotype existing as a necessary by-product of another phenotype.
After revision: Inspired by the famous discussion by Gould and Lewontin, we thus qualify antagonism as a necessary consequence of absolute discrimination.Thus antagonism constitutes a "phenotypic spandrel": a phenotype existing as a necessary by-product of another phenotype.