rational

adjective | \ ˈra-shə-nəl \ | ra·tio·nal
  1. : having reason or understanding

  1. : relating to, based on, or guided by reason, principle, fairness, logic, a legitimate state interest, or a consideration of fact age distinctions are not subject to strict scrutiny, but they must have a rational relationship to a legitimate state interest —In re J. M., 642 A.2d 1062 (1994)