known fact

known fact

A fact that is considered public knowledge. It is a known fact that this substance causes cancer, Mr. Anderson, and yet your company continues to use it in your products. Would you care to tell the jury why that is? I always thought it was a known fact that carrots helped you see in the dark, but I just found out it is a myth!
See also: fact, known
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

known fact

something that is generally recognized as a fact. That grass is green is a known fact. It is a known fact that John was in Chicago on the night of the murder.
See also: fact, known
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
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References in classic literature ?
It is a known fact in human nature, that its affections are commonly weak in proportion to the distance or diffusiveness of the object.
He had made himself indispensable in several quarters, amongst others in his department of the government; and yet it was a known fact that Fedor Ivanovitch Epanchin was a man of no education whatever, and had absolutely risen from the ranks.
Every known fact in natural science was divined by the presentiment of somebody, before it was actually verified.
Nothing that has life, either animal or vegetable as we know them, can exist without air, and it follows that nothing having life, according to our views of it, can exist in the moon:--or, if any thing having life do exist there, it must be under such modifications of all our known facts, as to amount to something like other principles of being." "One side of that planet feels the genial warmth of the sun for a fortnight, while the other is for the same period without it," he continued.
However anxiously we may wish that these complaints had no foundation, the evidence, of known facts will not permit us to deny that they are in some degree true.
My interest is keenest, perhaps, not so much in relation to known facts as to speculation upon the unknowable of the two centuries that have rolled by since human intercourse between the Western and Eastern Hemispheres ceased--the mystery of Europe's state following the termination of the Great War--provided, of course, that the war had been terminated.
However that might be, the known facts were that a few weeks before the factory closed, Marija had been cheated out of her pay for three hundred cans.
"Gauze is still used probably 50 percent of the time," he said, calling his figure an estimate, not a statistically known fact. "The gauze market is larger than the moist market."
So, even when we undertake an analysis of the psyche of an Adams or a Jefferson, a great deal of the analysis has to be confected from a feeble sprinkling of known fact and a deluge of speculation.
It's a little known fact that several Army aviators flew with the Navy squadron while the Navy crews were working up to full-mission capability.
Duffett says it is a known fact that kimberlites appear in clusters, and after the company announced their discovery, it prompted the region's biggest staking rush in the last 20 years by several juniors, all wanting a piece of the diamond pie.
It's a known fact that more engine starters end up at support for service and repair during cold weather.
(Little known fact #1: the directors of engineering at GM and Ford personally wrote the Warren Commission Report.
Little known fact, but nine Long Island, New York, school districts actually have shooting teams.
It is a known fact if you don't live in the catchment area or are not of the religion of a school you can't get your children in.