Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
asserting on
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "asserting on" is not correct in standard written English.
It is typically used incorrectly; the correct preposition should be "asserting" followed by "that" or "about" depending on the context. Example: "He is asserting that the new policy will improve productivity."
⚠ May contain grammatical issues
News & Media
Academia
Science
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
17 human-written examples
Mr Wade set the bait by asserting (on the basis of no good evidence) that global inequality is rising because of liberalisation and globalisation.
News & Media
Peña Nieto has taken to issuing near-simultaneous correctives to President Trump's claims, asserting on Twitter, for example, that Mexico will never pay for a U.S. border wall.
News & Media
It concluded: "The President, through a United States Attorney, need not, indeed may not, prosecute criminally a subordinate for asserting on his behalf a claim of executive privilege.
News & Media
The Democrats then retreated, with Senator Joseph Lieberman asserting on television that election officials should give military ballots the "benefit of the doubt".
News & Media
Mr. Trump attacked the article, falsely asserting on Twitter that Times reporters relied on "no legitimate sources," a longstanding tactic of his to try to dismiss news reports that portray him negatively.
News & Media
Gardiner chastised Obama for asserting on Friday that if Britain exited the European Union, it would have to go to the "back of the queue" to cut a separate deal with the United States.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
43 human-written examples
Writing in The New York Review of Books, Steve Coll assailed "Zero Dark Thirty" for taking fictional liberties from the factual record, all the while asserting on-screen that it is "based on firsthand accounts of actual events".
News & Media
"Goes right through skin," Susan Shaw, a marine toxicologist, asserted on CNN, adding that the chemicals had caused one shrimper to start "bleeding from the rectum".
News & Media
How will sovereignty be asserted on this stream of data?
News & Media
That said, northernness was immediately asserted on the train.
News & Media
"Baby boom is just beginning," the Augusta Chronicle asserted on June 25.
News & Media
Expert writing Tips
Best practice
Avoid using the phrase "asserting on". Replace it with more grammatically sound alternatives like "asserting that" or "asserting a claim" for clearer and more professional communication.
Common error
Do not directly follow "asserting" with the preposition "on". This construction is grammatically incorrect. Use "asserting that" followed by a clause, or rephrase to use a different verb like "claiming" or "stating".
Source & Trust
85%
Authority and reliability
2.8/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "asserting on" functions as a verb phrase followed by a preposition, but it is grammatically incorrect. According to Ludwig AI, a more suitable phrasing would be to use "asserting that" followed by a clause.
Frequent in
News & Media
50%
Academia
33%
Science
17%
Less common in
Encyclopedias
0%
Wiki
0%
Formal & Business
0%
Ludwig's WRAP-UP
In summary, while the phrase "asserting on" appears in various sources, Ludwig AI identifies it as grammatically incorrect. A more appropriate construction is "asserting that", which should be used instead to maintain grammatical accuracy and clarity. Although it is a common mistake, particularly in News & Media, Academia, and Science, its frequent use does not validate its correctness. Remember to use alternatives like "stating that" or "claiming that" to express your intended meaning more effectively and professionally.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
stating that
Replaces the verb and preposition with a more direct construction.
claiming that
Implies the statement may be open to doubt or requires verification.
maintaining that
Suggests a persistent assertion despite potential contradiction.
insisting that
Indicates a firm and unwavering declaration.
contending that
Presents the assertion as part of an argument or debate.
arguing that
Frames the assertion as a point of view in a discussion.
declaring that
Implies a formal or official announcement.
affirming that
Suggests a strong and positive declaration of truth.
professing that
Implies a personal belief or conviction being declared.
alleging that
Suggests the assertion is made without conclusive proof.
FAQs
What can I say instead of "asserting on"?
The phrase "asserting on" is grammatically incorrect. You can use alternatives like "stating that", "claiming that", or "maintaining that" depending on the context.
How to use "asserting" correctly in a sentence?
Instead of "asserting on", use "asserting that" followed by a clause. For example, "He is asserting that the policy will improve productivity" is correct, while "He is asserting on the policy" is not.
Which is correct, "asserting on" or "asserting that"?
"Asserting that" is the correct grammatical form. "Asserting on" is not a standard or accepted usage in English.
Is "asserting on" ever correct in English?
No, the phrase "asserting on" is generally considered grammatically incorrect in standard English. It's better to use alternatives such as "insisting on" in certain contexts, or rewrite using "asserting that".
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
85%
Authority and reliability
2.8/5
Expert rating
Real-world application tested