| arguable(adjective, sound, sensible, rational, practical) |
| believable(adjective, sound, sensible, rational, practical) |
| benevolent(adjective, reasonable, rational, just, open-minded) |
| blameless(adjective, reasonable, honest, fair, pure) |
| cerebral(adjective, sound, sensible, rational, practical) |
| civil(adjective, reasonable, rational, just, open-minded) |
| clean(adjective, reasonable, rational, just, open-minded) |
| clear-cut(adjective, sound, sensible, rational, practical) |
| clear stage(expression, idiom, right) |
| cognitive(adjective, sound, sensible, rational, practical) |
| cold(detached, neutral, impartial, dispassionate) |
| commonsensical(adjective, sound, sensible, rational, practical) |
| condign(fair, objective, impartial) |
| conscientious(fair, objective, impartial) |
| conscious(adjective, sound, sensible, rational, practical) |
| consequent(adjective, sound, sensible, rational, practical) |
| consistent(adjective, sound, sensible, rational, practical) |
| counterbalanced(fair, impartial) |
| courteous(adjective, reasonable, rational, just, open-minded) |
| credible(adjective, sound, sensible, rational, practical) |