• judicious, knowing, Sharp-witted, astute, brilliant, sane, highbrow, shrewd, perspicacious, sharp, quick-witted, insightful, unconfused, rational, fast, prudent, skilled, acute, discerning, conscious, cerebral, foxy, cunning, intellectual, well-read, sensible, scholarly, sage, sapient, intelligent, knowledgeable, sound, informed, sagacious, trained, crafty, erudite, educated, brainy, literate, logical, smart, perceptive, ingenious, wily, supersmart, keen, wise, valid, resourceful, clearheaded, quick, thinking, hyperintelligent, schooled, apt, percipient, reasonable, ultrasmart, nimble, savvy, clever, bright, learned.