'essentially argue' is a valid phrase that can be used in written English.
It is usually used when referring to a line of reasoning or a viewpoint and when attempting to explain why a speaker believes a certain thing to be true. For example, "John essentially argued that the government's policy was flawed, as it didn't take into consideration the economic effects it could have on lower-income citizens."
He'll essentially argue that the acting job isn't a principal job, because it's temporary.
Realists, such as John Mearsheimer, Jack Matlock and Stephen Cohen, essentially argue that Russia is reacting to excessive NATO expansion into Central and Eastern Europe.
As the emergence of this new industry matches to the characteristics of Japan's institutional and knowledge regime we essentially argue that the notion of regimes with fewer start-ups being inefficient is erroneous.
Mr. Buffett — and other billionaire investors like Carl Icahn, Bill Ackman and Nelson Peltz — essentially argue that the simple disclosure of an investment would cause the price to rise so much as to scuttle their strategy.
That information is sure to be used by any future defendants accused of accounting fraud, as they essentially argue that they relied on the advice of Andersen in deciding that their financial machinations were proper.
They essentially argue that oil supply now represents a large strategic risk to global economic growth, and that smart governments ought to be developing comprehensive plans and pushing hard to move their citizens into more efficient cars, onto public transit and so forth – a greener energy path that would also be good for the climate.
JPMorgan essentially argues that these provisions blow a giant, C.D.S.-sized hole in Lehman's case.
The lawyers were essentially arguing that the jurors got it wrong.
Privacy, Dr. Westin essentially argued, is more than the right to be left alone.
The letter essentially argued that the Bill of Rights does not apply to the states.
Opponents are essentially arguing that states should be blocked by Congress from collecting taxes in a fair and rational matter.
