ra·tio·nal /'ra-shə-nəl/ adj1: having reason or understanding2: relating to, based on, or guided by reason, principle, fairness, logic, a legitimate state interest, or a consideration of factage 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)ra·tio·nal·i·ty /ˌra-shə-'na-lə-tē/ nra·tio·nal·ly adv
Merriam-Webster’s Dictionary of Law. Merriam-Webster. 1996.
agreeable to reason, analytical, balanced, cerebral, clearheaded, cognitive, consentaneus, discerning, discriminating, endowed with reason, enlightened, exercising reason, intelligent, judicious, justifiable, knowing, legitimate, levelheaded, logical, lucid, objective, plausible, ratiocinative, ratione praeditus, reasonable, reasoning, reflective, sagacious, sage, sane, sensible, sober, sound, stable, thinking, thoughtful, understanding, well-grounded, wise
associated concepts: rational basis
colorable (plausible), conscious (aware), convincing, deductive, discriminating (judicious), discursive (analytical), judicial, judicious, juridical, justifiable, logical, lucid, normal (sane), plausible, possible, pragmatic, reasonable (rational), sane, sapient, sensible, solid (sound), tenable
Burton's Legal Thesaurus. William C. Burton. 2006