"But defense counsel has no comparable obligation to ascertain or present the truth," White continued.
The problem is that in most fields, these are hard to ascertain unless you're pretty prominent.
Tan had been trying to ascertain the names of the more than 5,000 schoolchildren who died in the 2008 Sichuan earthquake.
It was often almost impossible to ascertain the motives of her captors.
We need a Special Select Committee on Benghazi to ascertain these facts and ensure that such a disaster never occurs again.
The trapper looked about him to ascertain in what situations he might find his friends.
All efforts to ascertain your fate proved utterly fruitless.
Carley searched her pockets for her goggles, only to ascertain that she had forgotten them.
They appraised me in their own minds, I saw, and were curious to ascertain what my full value was.
To ascertain how much power has been developed we must know how many foot pounds there are in a horse power.
early 15c., "to inform, to give assurance," from Anglo-French acerteiner, Old French acertener "to assure, certify" (13c.), from a "to" (see ad-) + certain "certain" (see certain). Modern meaning of "find out for sure by experiment or investigation" is first attested 1794. Related: Ascertained; ascertaining.