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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
they assert that
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "they assert that" is correct and usable in written English.
You can use it when you want to indicate that someone is making a claim or statement about something. Example: "In their research, they assert that climate change is accelerating at an unprecedented rate."
✓ Grammatically correct
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
60 human-written examples
They assert that mind exists for the historian and that matter exists for the natural scientist.
Science
They assert that goal theory can help in understanding quality management in general, and SSQI in particular.
They assert that instead a revival of indigenous understandings of personhood is needed.
They assert that human activity has affected the climate.
News & Media
But they assert that the exemptions are relatively narrow.
News & Media
They assert that they were denied sales commissions.
News & Media
They assert that it has few disincentive effects since it is payable only at death.
News & Media
But they assert that the device manufacturers cannot afford those tests.
News & Media
Lastly they assert that genetic engineering is inherently dangerous.The directive does not allow "patents on life".
News & Media
They assert that compulsive playing has actually been decreasing as the prices of items fall.
News & Media
They assert that he will not have access to the money.
News & Media
Expert writing Tips
Best practice
Use "they assert that" to introduce a formal claim or statement made by a group, especially when you want to convey a sense of authority or conviction behind their words.
Common error
Avoid using "they assert that" when a more neutral verb like "state" or "say" would be more appropriate. "Assert" implies a forceful claim, which may not always be the intended meaning.
Source & Trust
86%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "they assert that" functions as a declarative phrase introducing a statement or claim made by a group. As seen in Ludwig, the phrase indicates a formal declaration or affirmation.
Frequent in
News & Media
45%
Science
37%
Academia
13%
Less common in
Formal & Business
2%
Wiki
2%
Reference
0%
Ludwig's WRAP-UP
In summary, the phrase "they assert that" is a grammatically correct and widely used phrase, as confirmed by Ludwig. It is commonly employed to introduce a formal statement or claim made by a group. While versatile, it's most frequently found in News & Media, scientific, and academic writing. When using this phrase, ensure that the context warrants a stronger affirmation and is not better suited to a more neutral term like "state" or "say". Ludwig's examples highlight the phrase's prevalence across different fields, confirming its utility in conveying a group's position with authority.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
they claim that
Uses a more general term "claim" instead of "assert", suggesting a potentially less forceful statement.
they maintain that
Emphasizes the persistence or consistency of the statement over time.
they contend that
Suggests a more argumentative or debated position being stated.
they argue that
Highlights the reasoning and justification behind the statement.
they state that
A more neutral and straightforward way of reporting the statement.
they declare that
Implies a more formal and public announcement of the statement.
they profess that
Suggests a strong belief or conviction underlying the statement.
they allege that
Indicates that the statement is made without definitive proof.
they posit that
Implies a more theoretical or hypothetical statement.
they suggest that
Offers a milder and more tentative version of the statement.
FAQs
What does "they assert that" mean?
The phrase "they assert that" means that a group of people are stating something as a fact or belief, often with confidence and conviction.
What can I say instead of "they assert that"?
You can use alternatives like "they claim that", "they argue that", or "they maintain that", depending on the context and the nuance you want to convey.
Is it better to use "they assert that" or "they claim that"?
"They assert that" implies a stronger and more confident statement than "they claim that". Use "assert" when the group is presenting their statement as a firm belief or fact.
How do I use "they assert that" in a sentence?
Use "they assert that" to introduce a clause that contains the statement being made. For example, "Researchers assert that the new findings will revolutionize the field."
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Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
86%
Authority and reliability
4.5/5
Expert rating
Real-world application tested