unexceptionable evidence
unimpeachable evidence

"These results will finally provide real, unimpeachable evidence to be used for accountability."

"He says he did," she added, because you could scarcely consider this unimpeachable evidence.

"We do need to test the propensities of the ghost, and we will need to present unimpeachable evidence for our claims.

They are unimpeachable evidence that alters the historical view of Mr. Nixon and his Presidency.

M. Quicherat (Apercus Nouveaux, p. 61) distinguishes three classes of abnormally conveyed knowledge, all on unimpeachable evidence.

And that issue, which in the case of productive knowledge is the product, in the knowledge of nature is the unimpeachable evidence of the senses as to each fact.

Private Eye X offers the following unimpeachable evidence as proof: Mrs. Lefferts said boyfriend X looked just like Duke Cathcart.

In retrospect, the first unimpeachable evidence of the White House's modus operandi was reported by the journalist Ron Suskind, for Esquire, at the end of 2002.

In late 1940, Churchill withheld from Roosevelt unimpeachable evidence that proved Hitler had lost interest in invading England, so that he could continue to press Washington for additional military support.

Even Antony could not contradict such unimpeachable evidence, while Dolabella chewed his nails down to the quick and thanked his primal instincts for not destroying Caesar's altar and column.

She's uncovered unimpeachable evidence that Armstead has sent up a stolen MiG fighter, manned by a terrorist, a kamikaze type, to blow us all up, the President, all of us.

Dr. W. E. Johnson of the Freshwater Institute of Winnipeg (Manitoba, Canada) convinced the Canadian government that unimpeachable evidence could be obtained by experimental pollution of pristine lakes through controlled overfertilization of specified elements.