a.
1.
Intellectual, endowed with reason, reasoning.
2.
Reasonable, just, right, equitable, moderate, fair, fit, proper, agreeable to reason, according to reason.
3.
Judicious, sagacious, enlightened, sensible, discreet, wise, intelligent.
4.
Sane, sound, sober, in one's right mind, in one's sober senses.