The phrase "assertions are needed" is correct and usable in written English.
You can use it when discussing the necessity of making claims or statements in a particular context, such as in an argument or analysis.
Example: "In order to support your thesis, assertions are needed to provide evidence and clarity."
Alternatives: "claims are required" or "statements are necessary."
But from here it looks like the Taylor rule on fiscal policy is that Obama is always wrong, and that state and local governments are either cash-constrained or not cash-constrained, depending on which assertion is needed to back up that position.
Contrary to Dr. Russell's assertion, additional data are needed to determine which of these patients meet criteria for MOH.
And given signs that the economy is indeed starting to recover, British voters are having second thoughts about the Tories' assertion that deeper cuts are needed.
Please let me politely take issue with you assertion that "radical" rule changes are needed to "fix" baseball.
The results obtained in this study might thus be understood to support the assertion that different kinds of leadership are needed for different kinds of worker, as suggested in the Hersey and Blanchard model (1969) [ 42], in which the leadership style matches the maturity and skill of the employees.
This section is devoted to certain auxiliary assertions that will be needed in the proof of the main theorem.
Despite ministers' assertions that the change was needed to prevent unfounded and vexatious claims, no evidence has emerged that shows the drastic decline is attributable to the falling of such claims.
"The real parties in interest here are the voters," the chief justice said, suggesting that the court could not easily dismiss the assertions that the recounts were needed to capture their true intent.
The work stirred up furious debate with its casual assertion that no God was needed to create the universe.
The increased visibility around transgender issues at MIT and beyond has made Francis cautiously optimistic, but she echoed Primack's assertion that more awareness is needed.
