The phrase "argument is that once" is correct and usable in written English.
It can be used when introducing a point or reasoning in a discussion or debate, particularly when referring to a specific condition or situation.
Example: "The argument is that once we implement these changes, we will see significant improvements in productivity."
Alternatives: "the claim is that once" or "the assertion is that once".
One argument is that, once the bill goes to conference with the Senate, Democrats might change the legislation in ways that Republicans can't support, then stick them with the blame if a deal isn't completed.
The obvious trouble with this argument is that, once the authorities start down Greenspan's road, they find it very hard to turn back.
Mr. Franklin's argument is that once you've accounted for the candidates' standing in national polls, also accounting for the winner of the straw poll won't help you to make better predictions about the winner of the Republican nomination: The simple conclusion then is that there is no evidence that straw poll success increases the likelihood of winning the G.O.P. presidential nomination.
The premise for this argument is that once natural selection generated the set of genes that build our big, smart human brains, those genes became "fixed" in the human population; virtually everyone receives the same set, and precious few variants affect intelligence.
The counter argument is that once you start stripping away great chunks of funding you weaken the stability [of the BBC]," Bowe said on Thursday night, at a Royal Television Society all party parliamentary group dinner marking her departure from Ofcom after five years as chair.
The key idea for those advancing this argument is that once a state grants same-sex couples all the rights of marriage – most especially parental rights and the right to adopt children – it can no longer defend a ban on same-sex marriage based on ideas about children.
The problem with these two arguments is that Barack Obama, once sworn in as president next January, will find himself in no position to ignore Ahmadinejad or wait until the summer for a regime change in Iran.
An alternative argument is that the doxorubicinol, once formed, is further metabolized, such that the metabolite is not retained in the method used to extract cellular doxorubicin and doxorubicinol for HPLC-based measurements.
A key part of his argument is that as the British people once enthusiastically embraced socialism, then we in our own times can and should emulate their example.
At its core, the official said, the argument the Israelis make is that once the Iranians get an "impregnable breakout capability" — that is, a place that is protected from a military strike — "it makes no difference whether it will take Iran six months or a year or five years" to fabricate a nuclear weapon, he said.
In this case, the argument of the study is that once the capacity of poor is enhanced for doing business then the opportunity to employ other poor people will also be increased, consequently; the poverty would be reduced geometrically.
