The phrase "a common assertion" is correct and usable in written English.
It can be used when referring to a statement or claim that is widely accepted or frequently made.
Example: "It is a common assertion that exercise improves mental health."
Alternatives: "a widely held belief" or "a frequent claim."
Contrary to a common assertion, patents issued to small patentees are much less valuable than those issued to large corporations.
One of his relatives repeated a common assertion that American troops paid bounties for Taliban suspects, and so encouraged unscrupulous local militias to accuse people falsely.
In 1969, he had publicly declared: "We will judge other countries, including communist countries, on the basis of their actions, not on the basis of their domestic ideologies". This is a common assertion of a school of foreign policy called "realism" - that only the external behavior of regimes really matters, that their internal conduct does not concern American interests.
The pressure induced by education reforms and market needs require the integration of a new and smart learning environment in higher education to bridge diverse viewpoints and develop a common assertion of what it means to be career-ready.
A common assertion is that people like Starks just won't accept housing, even if it were to be offered without strings.
A common assertion is that respect for autonomy in healthcare implies, at a minimum, that patients should not be coerced or manipulated into treatment if they are capable of making autonomous decisions about their care and treatment [ 2].
Our study also documented the common assertion that a short-term focus carries costs.
Prosecutors, in their argument for a single hearing, said they expected both men to make a much more central and common assertion: that each was less culpable and deserving of the death penalty than the higher-ups who ordered the bombings, starting with Mr. bin Laden.
"The study shows — once again — that the common assertion of a 'concealed ovulation' in human females needs to be reconsidered," Fink said.
So, does this place a large question mark over the common assertion that climate change is causing the world's glaciers to melt?
But the common assertion that energy drinks stop a person from feeling intoxicated is just not true, according to a recent study at Boston University.
