| unimpeachable(adjective, certainty) |
| convincing(adjective, sound, reasonable, certain, definite) |
| final(adjective, certain, definite, precise, sure) |
| unmistakable(adjective, clear, certain, definite, precise) |
| valid(adjective, clear, sound, right, reasonable) |
| decided(adjective, clear, severe, solid, certain) |
| demonstrable(adjective, demonstration, evident, provable) |
| evident(adjective, clear, material, certain, obvious) |
| inarguable(adjective, clear, certain, true, definite) |
| irresistible(adjective, demonstration) |
| obvious |
| real(adjective, clear, material, certain, sure) |
| solid(adjective, sound, reasonable, material, certain) |
| strong(sound, reasonable, rational) |
| unassailable(adjective, certain, true) |
| accurate(adjective, sound, reasonable, certain, rational) |
| assured(adjective, clear, certain, definite, sure) |
| definitive |
| proven(adjective, sound, reasonable, certain, rational) |
| set(adjective, clear, sound, firm, solid) |