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
asserts on
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "asserts on" is not correct and usable in written English.
The correct expression would typically be "asserts that" or "asserts something." Example: "The researcher asserts that the findings support the hypothesis."
⚠ May contain grammatical issues
News & Media
Science
Academia
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
Playing with recent assertions that William Shakespeare was a Roman Catholic, Duffy asserts on the strength of a single famous but elusive phrase in one Shakespeare sonnet about "bare ruin'd quiers" that "In the mind and mouth of the most illustrious of all Elizabethans, the Tudor religious revolutions had elicited not even the most equivocal of endorsements".
News & Media
It is a right that the United States vigorously asserts on behalf of American citizens arrested abroad.
News & Media
"WORKS in the public domain may be used freely without the permission of the former copyright owner," the United States Copyright Office (USCO) asserts on this website.
News & Media
Although it asserts on appeal that Lens.com's acts of direct infringement included purchasing merely generic keywords and then failing to designate the 1800CONTACTS mark as a negative keyword, that theory was not raised in district court.
Academia
"People can't connect to a band the way that they can to a solo artist," she asserts, on the phone from Washington, midway through a US tour supporting James Bay.
News & Media
The company does seem to have bungled things with the popular soprano Aprile Millo, who was announced as a participant but asserts on her blog that she was never asked to appear.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
43 human-written examples
"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
Weeks earlier, a prominent Sunday newspaper had boldly asserted on its front page, "Mbeki Is Back".
News & Media
Expert writing Tips
Best practice
Prefer using "asserts that" or "asserts something" for grammatically correct and clearer communication. This usage aligns with standard English and avoids potential misinterpretations.
Common error
Avoid using prepositions like "on", "in", or "at" directly after "asserts". The verb "assert" typically takes a "that" clause or a direct object. Using a preposition can lead to awkward or incorrect phrasing.
Source & Trust
89%
Authority and reliability
2.8/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "asserts on" functions as a verb followed by a preposition. However, Ludwig AI indicates that this construction is grammatically incorrect in standard English. The verb "assert" typically introduces a "that" clause or a direct object.
Frequent in
News & Media
40%
Science
30%
Academia
30%
Less common in
Encyclopedias
0%
Formal & Business
0%
Wiki
0%
Ludwig's WRAP-UP
In summary, while the phrase "asserts on" appears in various sources, including news and academic texts, Ludwig AI identifies it as grammatically incorrect in standard English. The correct and preferred forms are "asserts that" or "asserts something". Given its uncommon usage and potential for misinterpretation, it's best to avoid "asserts on" in formal writing. Instead, opt for clearer and more grammatically sound alternatives like ""asserts that"", "claims", or "maintains" to ensure effective communication.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
asserts that
Replaces the preposition "on" with the conjunction "that" to introduce a clause.
maintains that
Uses "maintains" instead of "asserts", followed by the conjunction "that".
contends that
Substitutes "contends" for "asserts", followed by the conjunction "that".
affirms that
Replaces "asserts" with "affirms", followed by the conjunction "that".
claims on
Uses "claims" instead of "asserts", maintaining the preposition "on".
argues that
Substitutes "argues" for "asserts", followed by the conjunction "that".
insists on
Uses "insists" instead of "asserts", maintaining the preposition "on".
states on
Substitutes "states" for "asserts", keeping the preposition "on".
declares on
Replaces "asserts" with "declares", keeping the preposition "on".
positively states
This alternative replaces "asserts" with the phrase "positively states", offering a more descriptive way to express a firm declaration, while altering the sentence structure to eliminate the preposition.
FAQs
What is the correct way to use the word "asserts"?
The word "asserts" is typically followed by "that" to introduce a clause, as in "He "asserts that" the data is accurate". Alternatively, it can be followed by a direct object, like "She asserts her innocence".
Is "asserts on" grammatically correct?
No, "asserts on" is generally considered grammatically incorrect. The correct usage involves "asserts that" or "asserts" followed by a direct object. While you might find instances of "asserts on", they are not considered standard English.
What can I say instead of "asserts on"?
Instead of "asserts on", use phrases like ""asserts that"", "claims", or "maintains". The best choice depends on the specific context and the nuance you want to convey.
How does the meaning change if I use "asserts that" instead of "asserts on"?
Using ""asserts that"" provides a grammatically correct and clear way to introduce the statement being made. "Asserts on" is not standard, so switching to "asserts that" ensures your writing is clear and follows established grammatical conventions.
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
89%
Authority and reliability
2.8/5
Expert rating
Real-world application tested