adjective. Impossible to refute or disprove; incontrovertible.

Not refutable; incapable of being refuted or disproved.

Synonyms See list under irrefragable.

adjective. Incapable of being refuted or disproved; indisputable.

adjective. undeniable; unable to be disproved or refuted

adjective. impossible to deny or disprove

"For readers who fail to grasp Mr. Hersh's point from the subtitle alone, his central contention is that there exists no "irrefutable evidence of an ongoing hidden nuclear-weapons program in Iran"—which is surely right, since the word "irrefutable" allows for no ambiguity."

refutable  

undeniable  

disputable  immutable  indisputable  inscrutable  mutable  

anecdotal  circumstantial  cogent  corroborative  deductive  

absolute  actual  adducible  admissible  admitting no question