If you say that something is indisputable, you are emphasizing that it is true and cannot be shown to be untrue. adj oft it v-link ADJ that (emphasis)
It is indisputable that birds in the UK are harbouring this illness...
Translation English Cobuild Collins Dictionary
absolute, beyond doubt, certain, evident, incontestable, incontrovertible, indubitable, irrefutable, positive, sure, unassailable, undeniable, unquestionable
assailable, disputable, doubtful, indefinite, questionable, refutable, uncertain, vague
English Collins Dictionary - English synonyms & Thesaurus
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