The phrase "adequately proven" is correct and usable in written English.
It can be used when discussing whether something has been sufficiently demonstrated or established as true or valid.
Example: "The theory was adequately proven through a series of rigorous experiments and peer-reviewed studies."
Alternatives: "sufficiently demonstrated" or "properly established".
Drucker's expertise was the art of managing people, but it was "by no means adequately proven", he wrote self-effacingly, that this was even possible.
Berkovits, quoted in the Toronto Star, said, "We are disappointed that the Crown decided that this case could not be adequately proven to find a verdict of guilty.
FGIC attorney Edward Soto argued Tuesday that the city has not adequately proven that most of Detroit's 30,000 retirees and workers will suffer a hardship if the city's bankruptcy plan is approved.
At the same time the industry would agree to operate under tight new restrictions on the sale and advertising of cigarettes.Although it has been pretty plain since the 1960s that cigarettes are addictive and that they cause lung cancer and other fatal diseases, the great tobacco companies have clung obstinately to the view that none of this has been adequately proven.
Despite the current emphasis on restoring drained peatlands, many of the predicted responses to restoration are still not adequately proven and the mechanisms behind them still uncertain.
Wood may be perceived as new and innovative while not considered as adequately proven as steel and concrete with regards to engineering aspects.
The judge at his trial said prosecutors had failed to adequately prove he had acted "recklessly", suggesting the state's attorney's office had mischarged Servin.
The general director of the city government, Francisco Garduno, said residents behaved adequately, proving that there was no need for the government to retain the law.
In order to adequately prove the case for dismantling HBCUs, it would be necessary to show that students who attend them would do as well in other universities and that HBCUs no longer serve a useful purpose.
The F.D.A. said that to approve the salmon, it determined that the fish was safe to eat, that the inserted genetic elements did not harm the fish itself, and that the company had adequately proved that the salmon grew faster.
Hundreds of thousands of Israelis, mostly Russian immigrants and their children, are barred from marriage and adoption because they cannot adequately prove their Jewish identity; only conversions conducted by rabbinate-authorized rabbis are accepted.
