Antonyms of adj irrefutable

1 sense of irrefutable

Sense 1
incontrovertible, irrefutable, positive -- (impossible to deny or disprove; "incontrovertible proof of the defendant's innocence"; "proof positive"; "an irrefutable argument")

INDIRECT (VIA undeniable) -> deniable -- (capable of being denied or contradicted)

Similarity of adj irrefutable

1 sense of irrefutable

Sense 1
incontrovertible, irrefutable, positive -- (impossible to deny or disprove; "incontrovertible proof of the defendant's innocence"; "proof positive"; "an irrefutable argument")
       => undeniable (vs. deniable) -- (not possible to deny)