| positive(adjective, clear, certain, true) |
| unassailable(adjective, certain, true, definite) |
| indubitable(adjective, clear, certain, true) |
| evident(adjective, certain, definite, unquestionable) |
| accurate(certain, unquestionable, indisputable, unassailable) |
| apodictic(certain, unquestionable, indisputable, unassailable) |
| beyond question(expression, certain, indisputable, undeniable) |
| can bet on it(expression, certain, unquestionable, indisputable) |
| double-checked(certain, unquestionable, indisputable, unassailable) |
| invincible(certain, unquestionable, indisputable, unassailable) |
| ironclad(certain, unquestionable, indisputable, unassailable) |
| irrebuttable(certain, unquestionable, indisputable, unassailable) |
| irresistible(certain, unquestionable, indisputable, unassailable) |
| nof ifs ands or buts(expression, certain, unquestionable, indisputable) |
| obvious(certain, definite, unquestionable, indisputable) |
| odds-on(certain, unquestionable, indisputable, unassailable) |
| proven(certain, definite, unquestionable, indisputable) |
| unimpeachable(certain, unquestionable, indisputable, unassailable) |