The phrase "ascertained that it" is correct and usable in written English.
You can use it when you want to express that you have determined or discovered something specific about a subject.
Example: "After reviewing the evidence, I ascertained that it was indeed a case of fraud."
Alternatives: "determined that it" or "found that it".
A feasibility consultant, Lisa C. Westheimer, ascertained that it would.
Puzzled, we resumed reading our card, and gradually ascertained that it was just an imprinted ad for the British Overseas Airways Corporation, urging us to pop aboard a double-decked stratocruiser at once.
MSF has already completed a separate assessment of the attack in Syria and said that ballistic analysis and the collection of local testimonies ascertained that it was an air attack, using missiles rather than barrels of explosives.
Investigators eventually ascertained that it belonged to Mr. Petraeus and studied the possibility that someone had hacked into Mr. Petraeus's account or was posing as him to send the explicit messages.
When he ascertained that it would be impossible for him to obtain the Clerkship, he applied for and received a commission as Second Lieutenant in the Army, in which capacity he was soon to be detailed for special service in connection with his long-cherished plan of reorganizing the State Militia.
Mr Markin earlier gave brief details of the killing: "The SK investigator ascertained that it was Cherkessov who fired on Sviridov, inflicting a fatal head wound upon him". Police say Mr Sviridov was shot dead with a rubber bullet pistol on Monday night in a fight at a bus stop involving 10 people on Kronshtadt Boulevard.
To determine the effect of other gene subcomponents, we have calculated the length of 5′-UTRs and transcript of these two disease groups since it was ascertained that miRNA also targets at these regions [ 8].
However, the prejudice that may result from misjoinder is not so difficult to ascertain that it must always be presumed to be present.
A new particle has been observed.The next step is to ascertain that it really is the sort of Higgs the inventors envisaged.
