| clear-headed |
| clear-sighted(sympathetic, witting, all-embracing) |
| clearheaded(adjective, sensible, rational, sober, articulate) |
| coherent(articulate, silver-tongued, well-spoken) |
| comprehendible(articulate, silver-tongued, well-spoken) |
| comprehending(smart, bright, sympathetic, witting, brainy) |
| comprehensible(articulate, silver-tongued, well-spoken) |
| comradely(sympathetic, witting, all-embracing) |
| cool as cucumber(expression, idiom, calm, reasonable, sensible) |
| crystal clear(expression, articulate, silver-tongued, well-spoken) |
| decent(adjective, good, sound, right, pure) |
| deft(bright, sharp-witted, quick-thinking) |
| dexterous(bright, sharp-witted, quick-thinking) |
| distinct(articulate, silver-tongued, well-spoken) |
| down with(expression, sympathetic, witting, all-embracing) |
| eggheaded(smart, skillful, nimble-witted) |
| eloquent(articulate, silver-tongued, well-spoken) |
| emotional(reasoning, intellectual, mental) |
| equitable(adjective, sound, sensible, rational, practical) |
| even-tempered(calm, sound, reasonable, sensible, rational) |