The phrase "agree with your assertion" is correct and usable in written English.
You can use it when you want to express that you share the same opinion or belief as someone else's statement or claim.
Example: "After reviewing the evidence, I must say that I agree with your assertion that climate change is a pressing issue."
Alternatives: "concur with your statement" or "support your claim".
We agree with your assertion that a massive criminal market is an unintended consequence of controlling drugs.
Oliver W.S. Bordallo, Guam: I definitely agree with your assertion that there is something else going on here besides offensive cartoons.
Re "Dutch Retreat" (editorial, Feb. 25): Though I agree with your assertion that the Dutch withdrawal from Afghanistan undermines NATO's role there, you focus too much on the "embarrassing" nature of this decision.
In "Your Charity Dollars at Work" (Side Lines, Sept. 6, p. 24) I agree with your assertion that nonprofit reform is needed.
Thus, I do not agree with your assertion that paracellular glucose transport is generally negligible – this is particularly not the case when luminal glucose concentrations exceed 25mM.
We agree with your assertions that other issues are likely involved in the low commercialization activity at the university and we agree that surveying a mix of stakeholders involved in the research commercialization process could aid in uncovering other issues.
We agree with your assertions that additional reasons for low commercialization activity likely exist and that expanding our research questions and sample size to include a mix of stakeholders involved in the research commercialization process (including faculty that have been unsuccessful at commercializing their research and staff/administrators of the commercialization process, etc).
"QGC also does not agree with the assertion that its infrastructure has had a negative impact on the value of your property, or indeed any property currently hosting QGC infrastructure," a letter from its landholder relationships manager said.
How much do you agree with this assertion?
Few dispassionate experts would agree with that assertion.
Perhaps you agree with his assertion that drunkenness and self-loathing are integral to the British character and outlook.
