accurate knowledge

This is why accurate knowledge of solar behaviour benefits society.

“If the Virginian slaveholders had been frightened of British abolitionism, why only eight years after the war ended would the board of visitors or the trustees of the College of William & Mary, wealthy slaveholders all, award an honorary degree to Granville Sharp, the leading British abolitionist at the time? Had they changed their minds so quickly? ... The New York Times has no accurate knowledge of Virginia’s Revolutionary culture and cannot begin to answer these questions.”

I have no accurate knowledge of my age, never having seen any authentic record containing it.

There appeared to be reason for supposing that the drowned informer had hoped for a reward out of this forfeiture, and had obtained some accurate knowledge of Magwitch’s affairs.

Van Helsing sits in my study poring over the record prepared by the Harkers; he seems to think that by accurate knowledge of all details he will light upon some clue.