To hold w̃ [with] the papiſtes, […] the churche is an outward & ſup̃me [supreme] monarchie or raigne of the hole worlde, in whiche the pope hath a power irrefragable aſwel vpõ [upon] the laytie as vpon the clergie, agaynſt whom it is leful for no mortal man to reſiſt either in dedes or in wordes.

In this Kings reign flouriſhed in England, the Irrefragable Doctor Alexander de Hales, who was School-Maſter to the Angelic Dr. Thomas Aquinas.
Irrefragable doctor is a translation of Latin doctor irrefrāgābilis, an epithet used to describe Alexander of Hales by Pope Alexander IV (1199 or c. 1185 – 1261) in the papal bull De Fontibus Paradisi (1255).

This is the way to end the vexatious Queſtions about them [the Kingdom of the Picts], being taken out of the moſt authentick Records of Ireland, which are of ſuch irrefragable Authority, That ſome are perſuaded, had they been known to [William] Camden, he would never have diſputed the matter. And ſo I think too. But this irrefragable Authority is that of the Pſalter of Caſhel; […]

[A]ll the preſent compoſers of French comic operas imitate the Italian ſtyle, […] I wiſh this may not, ſometimes, happen in England; but, however that may be, it is certainly an irrefragable proof of the ſuperiority of that melody which is become the common muſical language of all Europe: […]

Bulfinch, a solicitor at Redcastle, came to him with irrefragable proofs of gross peculation on the part of the bailiff who managed the home farm which supplied the house and stables, and showed him that it was necessary to make a thorough investigation and change of system.

Lionel Trilling has cautioned us that an idea derived from reading is not a unitary, irrefragable thing but something modified in its transmission by the cultural community into which it falls, by the response to the language, by the power of understanding of those who receive it and by their purpose and intentions.

Senator [Chuck] Grassley. […] In that case [LaChance v. White, 174 F. 3d 1378 (1999)] the Federal Circuit held that a whistleblower had to present irrefragable proof that wrongdoing actually occurred in order to prove a claim. Have you ever heard of the irrefragable proof standard, and what's your understanding of the standard? […] Mr. [Richard Gary] Taranto. The Ampro case [Am-Pro Protective Agency, Inc. v. U.S., 281 F. 3d 1234 (2002)] is explicit in saying that the terminology we have used, sometimes irrefragable proof, sometimes something else, really ought to be treated as the same as clear and convincing evidence.

[…] Intire Affection (from whence Integrity has its name) as it is anſwerable to it-ſelf, proportionable, and rational; ſo it is irrefragable, ſolid, and durable.

Irrefragable

Meaning

Adj

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