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Discover LudwigThe phrase "are certainly known" is correct and usable in written English.
It can be used when expressing a high level of confidence about the knowledge or awareness of certain facts or information.
Example: "The effects of climate change are certainly known to scientists around the world."
Alternatives: "are widely recognized" or "are well established".
Dictionary
are certainly known
adverb
In a way which is certain; with certainty.
Exact(7)
Some of them are certainly known as "folklore" results.
Many of the discovered dependencies are certainly known facts for traffic investigators.
The explanation for dural traction as a cause of headache is that the expansion of a pituitary tumor within the sella turcica stimulates afferent fibers innervating the dura mater, which are certainly known to be pain producing [4].
Though barely reported, they are certainly known to planners.
Many are certainly known to have been killed in rivers, perhaps through being swept away by floods.
Most of the forces from Scotland and Orkney probably remained at Riccall throughout the battle (the earls Paul and Erlend Thorfinnsson are certainly known to have been stationed there the entire time), and has not been counted in the traditional figure.
Similar(53)
Hence the multivariate logistic model is pointing out those modules which are dangerous to the patient if they are activated, and, that are certainly know to be activated in luminal B tumours.
Little is certainly known about Spenser.
"We're certainly known as heartbreakers," he said.
Inside, the answer to that question is certainly known.
The greylag was certainly known to the Romans; a flock of them supposedly warned the Romans of the Gauls.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com