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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
commonly known that
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "commonly known that" is not correct in English.
The correct form would be "commonly known to" or "commonly known as." Example: "It is commonly known that exercise is beneficial for health."
⚠ May contain grammatical issues
News & Media
Science
Alternative expressions(17)
it is commonly known that
widely known that
it is generally accepted that
generally accepted that
it is common knowledge that
it's a well-known fact that
everyone knows that
it is understood that
it is recognized that
as everyone knows
it is a given that
it's no secret that
commonly understood that
all too familiar that
all too recognizable
all too aware that
all too clear that
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
"It was not commonly known that you could control risks".
News & Media
It is commonly known that a child's genes are inherited directly from the mother and father.
News & Media
"It is commonly known that there is an overrepresentation of Aboriginal Territorians in the justice system.
News & Media
Many neighbors said it was commonly known that Ulysses suffered from autism; city officials said he had a severe form.
News & Media
SIR - It is commonly known that China is famous for its black, white and red pandas ("Black and White and Red all Over", December 22).
News & Media
He still peruses bodybuilding magazines and recalls the 70's, when he was competing, as a much less P.C. time: "It was commonly known that bodybuilders that were black, African-Americans today we call it, had problems with their calves.
News & Media
The only problem with the toy Creosote is that the vomit it expels is green and viscous, whereas it is commonly known that in the movie Creosote's vomit is peach-coloured and has the consistency of watery paste.
News & Media
In a brief statement the industry minister, Jim Prentice, said that he had informed Alliant, or A.T.K. as it is commonly known, that he was not satisfied that the deal would "be of net benefit to Canada".
News & Media
In market research, it's commonly known that what people do is very different from what they say they will do.
News & Media
It is commonly known that organics in leachate are characterized by different biodegradability.
Science
It is commonly known that TBT is prone to quick hydrolysis.
Science
Expert writing Tips
Best practice
When using phrases like "commonly known that," ensure the information is indeed widely accepted and verifiable to avoid spreading misinformation.
Common error
Avoid beginning too many sentences with "it is commonly known that." Vary your sentence structure by directly stating the fact or using active voice constructions for a more engaging and dynamic writing style.
Source & Trust
84%
Authority and reliability
2.8/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "commonly known that" functions as a discourse marker used to introduce information assumed to be widely understood or accepted. Ludwig's analysis suggests the phrase, while frequent, isn't always grammatically precise.
Frequent in
Science
40%
News & Media
36%
Formal & Business
24%
Less common in
Academia
0%
Encyclopedias
0%
Wiki
0%
Ludwig's WRAP-UP
The phrase "commonly known that" is used to introduce facts assumed to be widely accepted. Ludwig's analysis points out that this phrase, although very frequent in various contexts such as Science and News & Media, is often considered grammatically incorrect. The correct forms are "it is commonly known that" or "widely known that." While the phrase intends to establish common ground with the reader, its incorrect usage can undermine the writer's credibility. Therefore, it is recommended to use grammatically sound alternatives to convey the same meaning effectively.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
widely known that
Replaces 'commonly' with 'widely', indicating broad awareness.
generally accepted that
Indicates a broad agreement or consensus.
it is common knowledge that
Slightly more formal way of expressing a well-known fact.
it's a well-known fact that
Highlights the statement as an established truth.
everyone knows that
Emphasizes universal awareness of the fact.
it is understood that
Focuses on the implied or assumed understanding of something.
it is recognized that
Highlights the acknowledgement of a particular fact or condition.
as everyone knows
Directly addresses the audience assuming their awareness.
it is a given that
Presents the statement as a foundational assumption.
it's no secret that
Suggests the information, while commonly known, might be sensitive.
FAQs
What's a grammatically correct alternative to "commonly known that"?
You can use phrases like "it is commonly known that" or, more concisely, "widely known that".
Is "commonly known that" considered formal or informal?
While the phrase is frequently used, it often appears in a more neutral or informal context. For formal writing, consider alternatives like "it is generally accepted that" for a more authoritative tone.
How can I verify if something is "commonly known" before using the phrase?
Before stating something is "commonly known that", check reputable sources, research its history, and consider whether the information is truly widespread and not just assumed.
What are some ways to rephrase a sentence starting with "commonly known that" for better impact?
Instead of "Commonly known that X is Y," try "X is widely recognized as Y," or "It is a well-established fact that X is Y". This approach can make your writing more direct and engaging.
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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
84%
Authority and reliability
2.8/5
Expert rating
Real-world application tested