| unquestionable(adjective, definite) |
| actual |
| authentic(good, sound, right, reasonable, rational) |
| authoritative(good, sound, right, reasonable, rational) |
| certain(adjective, strong, reasonable, easy, sensible) |
| confirmed(good, sound, right, reasonable, rational) |
| consistent(reasonable, sensible, natural, normal, valid) |
| convincing(sound, reasonable, rational) |
| enduring(adjective, calm, strong, sound, secure) |
| faithful(correct, proper, moral) |
| genuine(good, sound, right, reasonable, rational) |
| hard |
| honest |
| justifiable(adjective, sound, reasonable, rational, valid) |
| lasting(calm, strong, solid, steady, substantial) |
| lawful(adjective, good, sound, right, reasonable) |
| legal(good, sound, right, reasonable, rational) |
| potent(good, strong, sound, right, reasonable) |
| powerful(adjective, good, strong, great, sound) |
| proven(adjective, sound, reasonable, rational, logical) |