sensible

Synonyms: all there astute attentive au courant aware canny cognizant commonsensical conscious consequent conversant cool discerning discreet discriminating down-to-earth far-sighted having all one’s marbles informed in right mind intelligent judicious knowing logical matterof-fact practical prudent rational sagacious sage sane sentient shrewd sober sound together well-reasoned well-thought-out wise witting

Antonyms: indiscreet senseless unrealistic unreasonable unwise