The phrase "are substantive enough" is correct and usable in written English.
It can be used when discussing whether something has sufficient substance or significance to meet a particular standard or requirement.
Example: "The arguments presented in the debate are substantive enough to warrant further discussion on the topic."
Alternatives: "are significant enough" or "are meaningful enough".
Robert E. Rubin, the United States Treasury Secretary, may believe that the Japanese promises are substantive enough to deserve a big-buck intervention.
In the face of these difficulties, some philosophers have sought to develop accounts of the base property that are substantive enough for ethical supervenience to do dialectical work, but avoid some of the difficulties just sketched.
But when the latest edition of a dictionary appears on bookshelves, one could not help but wonder whether the changes in the latest edition are substantive enough to warrant their purchase.
The structure need not be elaborate or even permanent, but it must be substantive enough to indicate a serious commitment to those who use it.
"The likelihood is that those few anomalies, which exist in every election in the world, will not be substantive enough collectively to change the apparent results of this election," Mr. Carter said.
"It is conceivable that the decisive outcome to the election could encourage a pick-up in instructions to agents and ease some of the recent upward pressure on house prices, but it is doubtful that this will be substantive enough to provide anything more than temporary relief.
No moral claim that is plausibly offered as actually accepted by all, or nearly all, people can possibly be substantive enough to help settle on one view rather than another as better justified.
Mr Evans said he believed all they had was a photograph of the pair together - so asked Mr Coulson why the evidence he claimed to have was substantive enough to run such a major story.
The complaints then passed to Judge Karen LeCraft Henderson of the DC Circuit, who concluded that more than a dozen of the complaints were substantive enough to warrant investigation and she referred them to Chief Justice Roberts.
But she concluded that more than a dozen complaints were substantive enough to warrant investigation by an impartial panel and that they should not be handled by Judge Kavanaugh's fellow judges in the D.C. Circuit.
Simon Rubinsohn, Rics chief economist, said: "It is conceivable that the decisive outcome to the election could encourage a pick-up in instructions to agents and ease some of the recent upward pressure on house prices, but it is doubtful that this will be substantive enough to provide anything more than temporary relief.
