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Merriam-Webster:
Irrefutable (adj)
: impossible to refute : INCONTROVERTIBLE
irrefutable proof
Synonyms
accomplished, certain, inarguable, incontestable, incontrovertible, indisputable, indubitable, irrefragable, positive, sure, unanswerable, unarguable, unchallengeable, undeniable, unquestionable
Antonyms
answerable, arguable, contradictable, controvertible, debatable, disputable, doubtable, moot, negotiable, problematic (also problematical), questionable, refutable

näiteid
https://blog.ipleaders.in/all-you-need-to-know-about-physical-evidence/

https://blog.signaturit.com/en/registered-email-irrefutable-evidence-in-a-judicial-case

https://bbjlawyers.com/6-types-of-evidence-that-could-strengthen-your-car-accident-claim/