| notified |
| on the ball(expression, adjective, idiom, familiar, aware) |
| on to(expression, adjective, understanding, cool, keen) |
| penetrating(deep, thoughtful, perceptive, observant, insightful) |
| percipient(adjective, understanding, keen, sensible, certain) |
| perspicacious(adjective, sensible, intelligent, wise, shrewd) |
| plugged in(expression, adjective, cool, sensible, alert) |
| prepped(ready, aware, well-informed) |
| primed(adjective, knowledgeable, aware, well-informed, conversant) |
| realistic(reasonable, sober, shrewd, sane, level-headed) |
| reliable(adjective, knowledgeable, aware, well-informed, conversant) |
| set |
| sharp(adjective, understanding, sound, reasonable, smart) |
| solid |
| sure(adjective, understanding, keen, sensible, certain) |
| thoughtful(adjective, sound, sharp, sensible, deep) |
| tuned in(expression, adjective, understanding, cool, sensible) |
| understanding(adjective, sound, keen, sharp, smart) |
| valid |
| veteran(familiar, knowledgeable, competent, experienced, proficient) |