The phrase "a firm statement that" is correct and usable in written English.
You can use it when introducing a declaration or assertion that is clear and resolute.
Example: "The report included a firm statement that the project would be completed by the end of the year."
Alternatives: "a strong assertion that" or "a definitive declaration that".
A win on Saturday would send a firm statement that Wellington is a serious contender for the title.
Management made a firm statement that they will seek to reduce cash capex and investigate returning surplus capital.
A firm statement that bidders are unwelcome, and that East's plan must be given time, would be a useful deterrent.
Citigroup moved from neutral to sell, saying: Management made a firm statement that they will seek to reduce cash capex and investigate returning surplus capital.
But the commission's 7-to-4 vote in favor of reparations was a firm statement that advocates hope will lend moral weight to helping the riot's survivors.
On the surface it was an exposition of the arguments that were convulsing the intellectual community - but underneath it was a firm statement that psychiatry was not quite so damned as Laing and [Thomas] Szasz would have us believe.
It did not stand in the way of the Security Council's unity and consensus over a strong and firm statement that used a resolute language with Damascus.
The only firm statement that can be made today is that, for the vast majority of familial cases, sarcomeric gene mutations (or mutations in genes with indirect effects on sarcomeric proteins such as RB20) are the underlying cause of the disease and that they have almost certainly direct consequences on intrinsic cardiac myocyte properties.
Catherine Ashton, the EU's foreign-policy chief, made an uncharacteristically firm statement that Ms Tymoshenko's case would have "profound implications for EU-Ukraine bilateral relations, including for the conclusion of the association agreement".
However, Jane Sharp contradicted Raynald's advice to use a gentle medicine to induce vomiting with the firm statement that 'purging, especially in the first, or second, or about the last months, and vomiting is far worse' as it might itself cause miscarriage, and should therefore be avoided.
A person close to the board, however, said that in their discussion the directors had agreed they needed to send a strong statement that the firm understood the mood of Washington and the public.
