"claim with certainty" is a correct and usable phrase in written English.
It means to state something with confidence and without any doubt. Example: The scientist claimed with certainty that the new drug would cure cancer.
"We don't claim with certainty that Albert DeSalvo is a suspect in each of them," Mr. Conley said.
The campaign is moving regardless of whether Lehman finds a buyer, The Observer reported, citing so-called "well-placed sources" within the company, which claim with certainty that Fuld will have to step down before the New Year.
We cannot claim with certainty that the performed homing paths were completely novel.
This however cannot be claimed with certainty for the Highet and Drummond [ 35] study due to a lack of detail in the report.
6.10pm: Greg Barker's reassurances on this issue are certainly welcome, but I still cannot see how the government can claim with any certainty that the green deal loans will definitely help homeowners to save money over the long term.
The change is so drastic, the paper says, that scientists can claim with near certainty that events like the Texas heat wave last year, the Russian heat wave of 2010 and the European heat wave of 2003 would not have happened without the planetary warming caused by the human release of greenhouse gases.
The truth, if you will forgive my own mixed metaphors, is that it is very difficult to claim with any certainty whether today's growth figures mark a turning of the tide or a false dawn for the economy.
"Therefore we have no idea what is the evidence for their report in which they make the claim with such certainty".. Earlier this year, hackers from China - which is now Australia's biggest trading partner - were thought to be behind an attack on the Reserve Bank of Australia, the Australian Financial Review reported.
