The phrase "grounds the argument" is correct and usable in written English.
You can use this phrase to refer to the basis for a particular argument. For example, "The author's extensive research grounds the argument that the economy is in a downward trend."
"He has changed the grounds of the argument," said Alan Beith, a legislator from the opposition Liberal Democrats.
Lawsuits have already been filed on several grounds, including the argument that it will lead to the racial profiling of legal residents and that the state has unconstitutionally intruded on federal authority.
Homer, after all, was an oral storyteller, as were all "literary artists" who came before him, back to when storytelling, around the primal campfire, would have been invented — grounds for the argument that our brains were first (and thus best?) adapted to absorb long, complex fictions by ear, rather than by eye.
As noted at the end of Section 2.2, Kant's account of judgments of beauty has been criticized on the grounds that the argument for their universal validity, that is the Deduction of Pure Aesthetic Judgments, is unsuccessful.
In his original district court decision Massachusetts Judge Joseph Tauro struck down DOMA in part on 10th-Amendment grounds, accepting the argument made by the Commonwealth of Massachusetts, represented by Attorney General Martha Coakley, that DOMA was an unconstitutional encroachment by the federal government upon a matter of law that was traditionally the unique province of the states.
If there was a chance of British boots on the ground the arguments would be far more charged.
He reverses figure and ground in the argument.
Scottish Green MSP Patrick Harvie urged both sides to give ground on the argument.
But he stuck to his convictions, kept to the new centre ground, won the argument and then convincingly 'won the leadership election.
