| involuntary(adjective, spontaneous, instinctive, intuitive) |
| logical(adjective, clear, sound, reasonable, alert) |
| natural(adjective, spontaneous, instinctive, intuitive) |
| open minded |
| penetrative(adjective, understanding, keen, sharp, smart) |
| reasonable(adjective, sound, smart, bright, sensible) |
| sharp-eyed(adjective, alert, intelligent, attentive, watchful) |
| sharp-witted(adjective, keen, sharp, smart, bright) |
| spontaneous(adjective, instinctive, intuitive) |
| understood(adjective, spontaneous, instinctive, intuitive) |
| unreflecting(adjective, spontaneous, instinctive, intuitive) |
| untaught(adjective, spontaneous, instinctive, intuitive) |
| watchful(adjective, understanding, cool, sharp, bright) |
| aesthetic(adjective, observant, insightful, physical sensibility) |
| agile(adjective, smart, intelligent, clever) |
| appreciative(adjective, understanding, enthusiastic, sympathetic, alert) |
| apt(adjective, smart, bright, intelligent, wise) |
| awake(adjective, understanding, open, cool, keen) |
| brilliant(adjective, cool, sharp, smart, bright) |
| calculating(adjective, smooth, keen, sharp, smart) |