The phrase "argued powerfully" is correct and usable in written English.
It can be used when describing someone who presents their arguments in a strong and convincing manner.
Example: "During the debate, she argued powerfully for the need for climate action, leaving a lasting impression on the audience."
Alternatives: "made a compelling argument" or "presented a strong case."
He argued powerfully that the difference is one of degree rather than kind.
At times he has argued powerfully in favour of a cap-and-trade bill to moderate climate change.
William Easterly, an economist at New York University, has argued powerfully that shoveling money at poor countries accomplishes little.
I'm calling the case, Coleman v. Maryland Court of Appeals, a case about sex discrimination, and it was, as Justice Ruth Bader Ginsburg argued powerfully in her dissenting opinion.
Indeed, Weber's most powerful impact on his contemporaries came in the last years of his life, when, from 1916 to 1918, he argued powerfully against Germany's annexationist war goals and in favour of a strengthened parliament.
Indeed, Simon Wren-Lewis of Oxford University has argued powerfully that it is reckless for the government to press ahead with deficit cuts when the Bank has so little power to offset it with fresh rate cuts.
Tony Blair, in a new edition of his memoirs, argues powerfully that our political system is broken.
Eli Pariser argues powerfully that this will ultimately prove to be bad for us and bad for democracy.
Conservatives can argue powerfully that this would mean less wealth creation, leaving the poor perhaps more equal but worse off in absolute terms.
In the epilogue to a later collection, Dramatis Personae, the final speaker argues powerfully for the interconnection of "heaven's high" with "earth's low".
"Taken together, these measurements argue powerfully that the 2dFGRS galaxies do indeed trace the mass on large scales," she and 29 co-authors concluded in the recent paper.
